/**
 * @preserve
 * jquery.layout 1.3.0 - Release Candidate 30.79
 * $Date: 2013-01-12 08:00:00 (Sat, 12 Jan 2013) $
 * $Rev: 303007 $
 *
 * Copyright (c) 2012
 *   Fabrizio Balliano (http://www.fabrizioballiano.net)
 *   Kevin Dalman (http://allpro.net)
 *
 * Dual licensed under the GPL (http://www.gnu.org/licenses/gpl.html)
 * and MIT (http://www.opensource.org/licenses/mit-license.php) licenses.
 *
 * Changelog: http://layout.jquery-dev.net/changelog.cfm#1.3.0.rc30.79
 *
 * Docs: http://layout.jquery-dev.net/documentation.html
 * Tips: http://layout.jquery-dev.net/tips.html
 * Help: http://groups.google.com/group/jquery-ui-layout
 */

/* JavaDoc Info: http://code.google.com/closure/compiler/docs/js-for-compiler.html
 * {!Object}	non-nullable type (never NULL)
 * {?string}	nullable type (sometimes NULL) - default for {Object}
 * {number=}	optional parameter
 * {*}			ALL types
 */
/*	TODO for jQ 2.0 
 *	change .andSelf() to .addBack()
 *	$.fn.disableSelection won't work
 */

// NOTE: For best readability, view with a fixed-width font and tabs equal to 4-chars

;(function ($) {

// alias Math methods - used a lot!
    var	min		= Math.min
        ,	max		= Math.max
        ,	round	= Math.floor

        ,	isStr	=  function (v) { return $.type(v) === "string"; }

    /**
     * @param {!Object}			Instance
     * @param {Array.<string>}	a_fn
     */
        ,	runPluginCallbacks = function (Instance, a_fn) {
            if ($.isArray(a_fn))
                for (var i=0, c=a_fn.length; i<c; i++) {
                    var fn = a_fn[i];
                    try {
                        if (isStr(fn)) // 'name' of a function
                            fn = eval(fn);
                        if ($.isFunction(fn))
                            g(fn)( Instance );
                    } catch (ex) {}
                }
            function g (f) { return f; }; // compiler hack
        }
        ;

    /*
     *	GENERIC $.layout METHODS - used by all layouts
     */
    $.layout = {

        version:	"1.3.rc30.79"
        ,	revision:	0.033007 // 1.3.0 final = 1.0300 - major(n+).minor(nn)+patch(nn+)

        // $.layout.browser REPLACES $.browser
        ,	browser:	{} // set below

        // *PREDEFINED* EFFECTS & DEFAULTS 
        // MUST list effect here - OR MUST set an fxSettings option (can be an empty hash: {})
        ,	effects: {

            //	Pane Open/Close Animations
            slide: {
                all:	{ duration:  "fast"	} // eg: duration: 1000, easing: "easeOutBounce"
                ,	north:	{ direction: "up"	}
                ,	south:	{ direction: "down"	}
                ,	east:	{ direction: "right"}
                ,	west:	{ direction: "left"	}
            }
            ,	drop: {
                all:	{ duration:  "slow"	}
                ,	north:	{ direction: "up"	}
                ,	south:	{ direction: "down"	}
                ,	east:	{ direction: "right"}
                ,	west:	{ direction: "left"	}
            }
            ,	scale: {
                all:	{ duration:	"fast"	}
            }
            //	these are not recommended, but can be used
            ,	blind:		{}
            ,	clip:		{}
            ,	explode:	{}
            ,	fade:		{}
            ,	fold:		{}
            ,	puff:		{}

            //	Pane Resize Animations
            ,	size: {
                all:	{ easing:	"swing"	}
            }
        }

        // INTERNAL CONFIG DATA - DO NOT CHANGE THIS!
        ,	config: {
            optionRootKeys:	"effects,panes,north,south,west,east,center".split(",")
            ,	allPanes:		"north,south,west,east,center".split(",")
            ,	borderPanes:	"north,south,west,east".split(",")
            ,	oppositeEdge: {
                north:	"south"
                ,	south:	"north"
                ,	east: 	"west"
                ,	west: 	"east"
            }
            //	offscreen data
            ,	offscreenCSS:	{ left: "-99999px", right: "auto" } // used by hide/close if useOffscreenClose=true
            ,	offscreenReset:	"offscreenReset" // key used for data
            //	CSS used in multiple places
            ,	hidden:		{ visibility: "hidden" }
            ,	visible:	{ visibility: "visible" }
            //	layout element settings
            ,	resizers: {
                cssReq: {
                    position: 	"absolute"
                    ,	padding: 	0
                    ,	margin: 	0
                    ,	fontSize:	"1px"
                    ,	textAlign:	"left"	// to counter-act "center" alignment!
                    ,	overflow: 	"hidden" // prevent toggler-button from overflowing
                    //	SEE $.layout.defaults.zIndexes.resizer_normal
                }
                ,	cssDemo: { // DEMO CSS - applied if: options.PANE.applyDemoStyles=true
                    background: "#DDD"
                    ,	border:		"none"
                }
            }
            ,	togglers: {
                cssReq: {
                    position: 	"absolute"
                    ,	display: 	"block"
                    ,	padding: 	0
                    ,	margin: 	0
                    ,	overflow:	"hidden"
                    ,	textAlign:	"center"
                    ,	fontSize:	"1px"
                    ,	cursor: 	"pointer"
                    ,	zIndex: 	1
                }
                ,	cssDemo: { // DEMO CSS - applied if: options.PANE.applyDemoStyles=true
                    background: "#AAA"
                }
            }
            ,	content: {
                cssReq: {
                    position:	"relative" /* contain floated or positioned elements */
                }
                ,	cssDemo: { // DEMO CSS - applied if: options.PANE.applyDemoStyles=true
                    overflow:	"auto"
                    ,	padding:	"10px"
                }
                ,	cssDemoPane: { // DEMO CSS - REMOVE scrolling from 'pane' when it has a content-div
                    overflow:	"hidden"
                    ,	padding:	0
                }
            }
            ,	panes: { // defaults for ALL panes - overridden by 'per-pane settings' below
                cssReq: {
                    position: 	"absolute"
                    ,	margin:		0
                    //	$.layout.defaults.zIndexes.pane_normal
                }
                ,	cssDemo: { // DEMO CSS - applied if: options.PANE.applyDemoStyles=true
                    padding:	"10px"
                    ,	background:	"#FFF"
                    ,	border:		"1px solid #BBB"
                    ,	overflow:	"auto"
                }
            }
            ,	north: {
                side:			"top"
                ,	sizeType:		"Height"
                ,	dir:			"horz"
                ,	cssReq: {
                    top: 		0
                    ,	bottom: 	"auto"
                    ,	left: 		0
                    ,	right: 		0
                    ,	width: 		"auto"
                    //	height: 	DYNAMIC
                }
            }
            ,	south: {
                side:			"bottom"
                ,	sizeType:		"Height"
                ,	dir:			"horz"
                ,	cssReq: {
                    top: 		"auto"
                    ,	bottom: 	0
                    ,	left: 		0
                    ,	right: 		0
                    ,	width: 		"auto"
                    //	height: 	DYNAMIC
                }
            }
            ,	east: {
                side:			"right"
                ,	sizeType:		"Width"
                ,	dir:			"vert"
                ,	cssReq: {
                    left: 		"auto"
                    ,	right: 		0
                    ,	top: 		"auto" // DYNAMIC
                    ,	bottom: 	"auto" // DYNAMIC
                    ,	height: 	"auto"
                    //	width: 		DYNAMIC
                }
            }
            ,	west: {
                side:			"left"
                ,	sizeType:		"Width"
                ,	dir:			"vert"
                ,	cssReq: {
                    left: 		0
                    ,	right: 		"auto"
                    ,	top: 		"auto" // DYNAMIC
                    ,	bottom: 	"auto" // DYNAMIC
                    ,	height: 	"auto"
                    //	width: 		DYNAMIC
                }
            }
            ,	center: {
                dir:			"center"
                ,	cssReq: {
                    left: 		"auto" // DYNAMIC
                    ,	right: 		"auto" // DYNAMIC
                    ,	top: 		"auto" // DYNAMIC
                    ,	bottom: 	"auto" // DYNAMIC
                    ,	height: 	"auto"
                    ,	width: 		"auto"
                }
            }
        }

        // CALLBACK FUNCTION NAMESPACE - used to store reusable callback functions
        ,	callbacks: {}

        ,	getParentPaneElem: function (el) {
            // must pass either a container or pane element
            var $el = $(el)
                ,	layout = $el.data("layout") || $el.data("parentLayout");
            if (layout) {
                var $cont = layout.container;
                // see if this container is directly-nested inside an outer-pane
                if ($cont.data("layoutPane")) return $cont;
                var $pane = $cont.closest("."+ $.layout.defaults.panes.paneClass);
                // if a pane was found, return it
                if ($pane.data("layoutPane")) return $pane;
            }
            return null;
        }

        ,	getParentPaneInstance: function (el) {
            // must pass either a container or pane element
            var $pane = $.layout.getParentPaneElem(el);
            return $pane ? $pane.data("layoutPane") : null;
        }

        ,	getParentLayoutInstance: function (el) {
            // must pass either a container or pane element
            var $pane = $.layout.getParentPaneElem(el);
            return $pane ? $pane.data("parentLayout") : null;
        }

        ,	getEventObject: function (evt) {
            return typeof evt === "object" && evt.stopPropagation ? evt : null;
        }
        ,	parsePaneName: function (evt_or_pane) {
            var evt = $.layout.getEventObject( evt_or_pane )
                ,	pane = evt_or_pane;
            if (evt) {
                // ALWAYS stop propagation of events triggered in Layout!
                evt.stopPropagation();
                pane = $(this).data("layoutEdge");
            }
            if (pane && !/^(west|east|north|south|center)$/.test(pane)) {
                $.layout.msg('LAYOUT ERROR - Invalid pane-name: "'+ pane +'"');
                pane = "error";
            }
            return pane;
        }


        // LAYOUT-PLUGIN REGISTRATION
        // more plugins can added beyond this default list
        ,	plugins: {
            draggable:		!!$.fn.draggable, // resizing
            effects: {
                core:		!!$.effects		// animimations (specific effects tested by initOptions)
                ,	slide:		$.effects && ($.effects.slide || ($.effects.effect && $.effects.effect.slide)) // default effect
            }
        }

//	arrays of plugin or other methods to be triggered for events in *each layout* - will be passed 'Instance'
        ,	onCreate:	[]	// runs when layout is just starting to be created - right after options are set
        ,	onLoad:		[]	// runs after layout container and global events init, but before initPanes is called
        ,	onReady:	[]	// runs after initialization *completes* - ie, after initPanes completes successfully
        ,	onDestroy:	[]	// runs after layout is destroyed
        ,	onUnload:	[]	// runs after layout is destroyed OR when page unloads
        ,	afterOpen:	[]	// runs after setAsOpen() completes
        ,	afterClose:	[]	// runs after setAsClosed() completes

        /*
         *	GENERIC UTILITY METHODS
         */

        // calculate and return the scrollbar width, as an integer
        ,	scrollbarWidth:		function () { return window.scrollbarWidth  || $.layout.getScrollbarSize('width'); }
        ,	scrollbarHeight:	function () { return window.scrollbarHeight || $.layout.getScrollbarSize('height'); }
        ,	getScrollbarSize:	function (dim) {
            var $c	= $('<div style="position: absolute; top: -10000px; left: -10000px; width: 100px; height: 100px; overflow: scroll;"></div>').appendTo("body");
            var d	= { width: $c.css("width") - $c[0].clientWidth, height: $c.height() - $c[0].clientHeight };
            $c.remove();
            window.scrollbarWidth	= d.width;
            window.scrollbarHeight	= d.height;
            return dim.match(/^(width|height)$/) ? d[dim] : d;
        }


        /**
         * Returns hash container 'display' and 'visibility'
         *
         * @see	$.swap() - swaps CSS, runs callback, resets CSS
         * @param  {!Object}		$E				jQuery element
         * @param  {boolean=}	[force=false]	Run even if display != none
         * @return {!Object}						Returns current style props, if applicable
         */
        ,	showInvisibly: function ($E, force) {
            if ($E && $E.length && (force || $E.css("display") === "none")) { // only if not *already hidden*
                var s = $E[0].style
                // save ONLY the 'style' props because that is what we must restore
                    ,	CSS = { display: s.display || '', visibility: s.visibility || '' };
                // show element 'invisibly' so can be measured
                $E.css({ display: "block", visibility: "hidden" });
                return CSS;
            }
            return {};
        }

        /**
         * Returns data for setting size of an element (container or a pane).
         *
         * @see  _create(), onWindowResize() for container, plus others for pane
         * @return JSON  Returns a hash of all dimensions: top, bottom, left, right, outerWidth, innerHeight, etc
         */
        ,	getElementDimensions: function ($E, inset) {
            var
            //	dimensions hash - start with current data IF passed
                d	= { css: {}, inset: {} }
                ,	x	= d.css			// CSS hash
                ,	i	= { bottom: 0 }	// TEMP insets (bottom = complier hack)
                ,	N	= $.layout.cssNum
                ,	off = $E.offset()
                ,	b, p, ei			// TEMP border, padding
                ;
            d.offsetLeft = off.left;
            d.offsetTop  = off.top;

            if (!inset) inset = {}; // simplify logic below

            $.each("Left,Right,Top,Bottom".split(","), function (idx, e) { // e = edge
                b = x["border" + e] = $.layout.borderWidth($E, e);
                p = x["padding"+ e] = $.layout.cssNum($E, "padding"+e);
                ei = e.toLowerCase();
                d.inset[ei] = inset[ei] >= 0 ? inset[ei] : p; // any missing insetX value = paddingX
                i[ei] = d.inset[ei] + b; // total offset of content from outer side
            });

            x.width		= $E.width();
            x.height	= $E.height();
            x.top		= N($E,"top",true);
            x.bottom	= N($E,"bottom",true);
            x.left		= N($E,"left",true);
            x.right		= N($E,"right",true);

            d.outerWidth	= $E.outerWidth();
            d.outerHeight	= $E.outerHeight();
            // calc the TRUE inner-dimensions, even in quirks-mode!
            d.innerWidth	= max(0, d.outerWidth  - i.left - i.right);
            d.innerHeight	= max(0, d.outerHeight - i.top  - i.bottom);
            // layoutWidth/Height is used in calcs for manual resizing
            // layoutW/H only differs from innerW/H when in quirks-mode - then is like outerW/H
            d.layoutWidth	= $E.innerWidth();
            d.layoutHeight	= $E.innerHeight();

            //if ($E.prop('tagName') === 'BODY') { debugData( d, $E.prop('tagName') ); } // DEBUG

            //d.visible	= $E.is(":visible");// && x.width > 0 && x.height > 0;

            return d;
        }

        ,	getElementStyles: function ($E, list) {
            var
                CSS	= {}
                ,	style	= $E[0].style
                ,	props	= list.split(",")
                ,	sides	= "Top,Bottom,Left,Right".split(",")
                ,	attrs	= "Color,Style,Width".split(",")
                ,	p, s, a, i, j, k
                ;
            for (i=0; i < props.length; i++) {
                p = props[i];
                if (p.match(/(border|padding|margin)$/))
                    for (j=0; j < 4; j++) {
                        s = sides[j];
                        if (p === "border")
                            for (k=0; k < 3; k++) {
                                a = attrs[k];
                                CSS[p+s+a] = style[p+s+a];
                            }
                        else
                            CSS[p+s] = style[p+s];
                    }
                else
                    CSS[p] = style[p];
            };
            return CSS
        }

        /**
         * Return the innerWidth for the current browser/doctype
         *
         * @see  initPanes(), sizeMidPanes(), initHandles(), sizeHandles()
         * @param  {Array.<Object>}	$E  Must pass a jQuery object - first element is processed
         * @param  {number=}			outerWidth (optional) Can pass a width, allowing calculations BEFORE element is resized
         * @return {number}			Returns the innerWidth of the elem by subtracting padding and borders
         */
        ,	cssWidth: function ($E, outerWidth) {
            // a 'calculated' outerHeight can be passed so borders and/or padding are removed if needed
            if (outerWidth <= 0) return 0;

            var bs	= !$.layout.browser.boxModel ? "border-box" : $.support.boxSizing ? $E.css("boxSizing") : "content-box"
                ,	b	= $.layout.borderWidth
                ,	n	= $.layout.cssNum
                ,	W	= outerWidth
                ;
            // strip border and/or padding from outerWidth to get CSS Width
            if (bs !== "border-box")
                W -= (b($E, "Left") + b($E, "Right"));
            if (bs === "content-box")
                W -= (n($E, "paddingLeft") + n($E, "paddingRight"));
            return max(0,W);
        }

        /**
         * Return the innerHeight for the current browser/doctype
         *
         * @see  initPanes(), sizeMidPanes(), initHandles(), sizeHandles()
         * @param  {Array.<Object>}	$E  Must pass a jQuery object - first element is processed
         * @param  {number=}			outerHeight  (optional) Can pass a width, allowing calculations BEFORE element is resized
         * @return {number}			Returns the innerHeight of the elem by subtracting padding and borders
         */
        ,	cssHeight: function ($E, outerHeight) {
            // a 'calculated' outerHeight can be passed so borders and/or padding are removed if needed
            if (outerHeight <= 0) return 0;

            var bs	= !$.layout.browser.boxModel ? "border-box" : $.support.boxSizing ? $E.css("boxSizing") : "content-box"
                ,	b	= $.layout.borderWidth
                ,	n	= $.layout.cssNum
                ,	H	= outerHeight
                ;
            // strip border and/or padding from outerHeight to get CSS Height
            if (bs !== "border-box")
                H -= (b($E, "Top") + b($E, "Bottom"));
            if (bs === "content-box")
                H -= (n($E, "paddingTop") + n($E, "paddingBottom"));
            return max(0,H);
        }

        /**
         * Returns the 'current CSS numeric value' for a CSS property - 0 if property does not exist
         *
         * @see  Called by many methods
         * @param {Array.<Object>}	$E					Must pass a jQuery object - first element is processed
         * @param {string}			prop				The name of the CSS property, eg: top, width, etc.
         * @param {boolean=}			[allowAuto=false]	true = return 'auto' if that is value; false = return 0
         * @return {(string|number)}						Usually used to get an integer value for position (top, left) or size (height, width)
         */
        ,	cssNum: function ($E, prop, allowAuto) {

            if (!$E.jquery) $E = $($E);
            var CSS = $.layout.showInvisibly($E)
                ,	p	= $.css($E[0], prop, true)
                ,	v	= allowAuto && p=="auto" ? p : Math.round(parseFloat(p) || 0);
            $E.css( CSS ); // RESET
            return v;
        }

        ,	borderWidth: function (el, side) {
            if (el.jquery) el = el[0];
            var b = "border"+ side.substr(0,1).toUpperCase() + side.substr(1); // left => Left
            return $.css(el, b+"Style", true) === "none" ? 0 : Math.round(parseFloat($.css(el, b+"Width", true)) || 0);
        }

        /**
         * Mouse-tracking utility - FUTURE REFERENCE
         *
         * init: if (!window.mouse) {
	*			window.mouse = { x: 0, y: 0 };
	*			$(document).mousemove( $.layout.trackMouse );
	*		}
         *
         * @param {Object}		evt
         *
         ,	trackMouse: function (evt) {
		window.mouse = { x: evt.clientX, y: evt.clientY };
	}
         */

        /**
         * SUBROUTINE for preventPrematureSlideClose option
         *
         * @param {Object}		evt
         * @param {Object=}		el
         */
        ,	isMouseOverElem: function (evt, el) {
            var
                $E	= $(el || this)
                ,	d	= $E.offset()
                ,	T	= d.top
                ,	L	= d.left
                ,	R	= L + $E.outerWidth()
                ,	B	= T + $E.outerHeight()
                ,	x	= evt.pageX	// evt.clientX ?
                ,	y	= evt.pageY	// evt.clientY ?
                ;
            // if X & Y are < 0, probably means is over an open SELECT
            return ($.layout.browser.msie && x < 0 && y < 0) || ((x >= L && x <= R) && (y >= T && y <= B));
        }

        /**
         * Message/Logging Utility
         *
         * @example $.layout.msg("My message");				// log text
         * @example $.layout.msg("My message", true);		// alert text
         * @example $.layout.msg({ foo: "bar" }, "Title");	// log hash-data, with custom title
         * @example $.layout.msg({ foo: "bar" }, true, "Title", { sort: false }); -OR-
         * @example $.layout.msg({ foo: "bar" }, "Title", { sort: false, display: true }); // alert hash-data
         *
         * @param {(Object|string)}			info			String message OR Hash/Array
         * @param {(Boolean|string|Object)=}	[popup=false]	True means alert-box - can be skipped
         * @param {(Object|string)=}			[debugTitle=""]	Title for Hash data - can be skipped
         * @param {Object=}					[debugOpts]		Extra options for debug output
         */
        ,	msg: function (info, popup, debugTitle, debugOpts) {
            if ($.isPlainObject(info) && window.debugData) {
                if (typeof popup === "string") {
                    debugOpts	= debugTitle;
                    debugTitle	= popup;
                }
                else if (typeof debugTitle === "object") {
                    debugOpts	= debugTitle;
                    debugTitle	= null;
                }
                var t = debugTitle || "log( <object> )"
                    ,	o = $.extend({ sort: false, returnHTML: false, display: false }, debugOpts);
                if (popup === true || o.display)
                    debugData( info, t, o );
                else if (window.console)
                    console.log(debugData( info, t, o ));
            }
            else if (popup)
                alert(info);
            else if (window.console)
                console.log(info);
            else {
                var id	= "#layoutLogger"
                    ,	$l = $(id);
                if (!$l.length)
                    $l = createLog();
                $l.children("ul").append('<li style="padding: 4px 10px; margin: 0; border-top: 1px solid #CCC;">'+ info.replace(/\</g,"&lt;").replace(/\>/g,"&gt;") +'</li>');
            }

            function createLog () {
                var pos = $.support.fixedPosition ? 'fixed' : 'absolute'
                    ,	$e = $('<div id="layoutLogger" style="position: '+ pos +'; top: 5px; z-index: 999999; max-width: 25%; overflow: hidden; border: 1px solid #000; border-radius: 5px; background: #FBFBFB; box-shadow: 0 2px 10px rgba(0,0,0,0.3);">'
                        +	'<div style="font-size: 13px; font-weight: bold; padding: 5px 10px; background: #F6F6F6; border-radius: 5px 5px 0 0; cursor: sample;">'
                        +	'<span style="float: right; padding-left: 7px; cursor: pointer;" title="Remove Console" onclick="$(this).closest(\'#layoutLogger\').remove()">X</span>Layout console.log</div>'
                        +	'<ul style="font-size: 13px; font-weight: none; list-style: none; margin: 0; padding: 0 0 2px;"></ul>'
                        + '</div>'
                    ).appendTo("body");
                $e.css('left', $(window).width() - $e.outerWidth() - 5)
                if ($.ui.draggable) $e.draggable({ handle: ':first-child' });
                return $e;
            };
        }

    };


    /*
     *	$.layout.browser REPLACES removed $.browser, with extra data
     *	Parsing code here adapted from jQuery 1.8 $.browse
     */
    var u = navigator.userAgent.toLowerCase()
        ,	m = /(chrome)[ \/]([\w.]+)/.exec( u )
            ||	/(webkit)[ \/]([\w.]+)/.exec( u )
            ||	/(opera)(?:.*version|)[ \/]([\w.]+)/.exec( u )
            ||	/(msie) ([\w.]+)/.exec( u )
            ||	u.indexOf("compatible") < 0 && /(mozilla)(?:.*? rv:([\w.]+)|)/.exec( u )
            ||	[]
        ,	b = m[1] || ""
        ,	v = m[2] || 0
        ,	ie = b === "msie"
        ;
    $.layout.browser = {
        version:	v
        ,	safari:		b === "webkit"	// webkit (NOT chrome) = safari
        ,	webkit:		b === "chrome"	// chrome = webkit
        ,	msie:		ie
        ,	isIE6:		ie && v == 6
        // ONLY IE reverts to old box-model - update for older jQ onReady
        ,	boxModel:	!ie || $.support.boxModel !== false
    };
    if (b) $.layout.browser[b] = true; // set CURRENT browser
    /*	OLD versions of jQuery only set $.support.boxModel after page is loaded
     *	so if this is IE, use support.boxModel to test for quirks-mode (ONLY IE changes boxModel) */
    if (ie) $(function(){ $.layout.browser.boxModel = $.support.boxModel; });


// DEFAULT OPTIONS
    $.layout.defaults = {
        /*
         *	LAYOUT & LAYOUT-CONTAINER OPTIONS
         *	- none of these options are applicable to individual panes
         */
        name:						""			// Not required, but useful for buttons and used for the status-cookie
        ,	containerClass:				"ui-layout-container" // layout-container element
        ,	inset:						null		// custom container-inset values (override padding)
        ,	scrollToBookmarkOnLoad:		true		// after creating a layout, scroll to bookmark in URL (.../page.htm#myBookmark)
        ,	resizeWithWindow:			true		// bind thisLayout.resizeAll() to the window.resize event
        ,	resizeWithWindowDelay:		200			// delay calling resizeAll because makes window resizing very jerky
        ,	resizeWithWindowMaxDelay:	0			// 0 = none - force resize every XX ms while window is being resized
        ,	maskPanesEarly:				false		// true = create pane-masks on resizer.mouseDown instead of waiting for resizer.dragstart
        ,	onresizeall_start:			null		// CALLBACK when resizeAll() STARTS	- NOT pane-specific
        ,	onresizeall_end:			null		// CALLBACK when resizeAll() ENDS	- NOT pane-specific
        ,	onload_start:				null		// CALLBACK when Layout inits - after options initialized, but before elements
        ,	onload_end:					null		// CALLBACK when Layout inits - after EVERYTHING has been initialized
        ,	onunload_start:				null		// CALLBACK when Layout is destroyed OR onWindowUnload
        ,	onunload_end:				null		// CALLBACK when Layout is destroyed OR onWindowUnload
        ,	initPanes:					true		// false = DO NOT initialize the panes onLoad - will init later
        ,	showErrorMessages:			true		// enables fatal error messages to warn developers of common errors
        ,	showDebugMessages:			false		// display console-and-alert debug msgs - IF this Layout version _has_ debugging code!
//	Changing this zIndex value will cause other zIndex values to automatically change
        ,	zIndex:						null		// the PANE zIndex - resizers and masks will be +1
//	DO NOT CHANGE the zIndex values below unless you clearly understand their relationships
        ,	zIndexes: {								// set _default_ z-index values here...
            pane_normal:			0			// normal z-index for panes
            ,	content_mask:			1			// applied to overlays used to mask content INSIDE panes during resizing
            ,	resizer_normal:			1			// normal z-index for resizer-bars
            ,	pane_sliding:			100			// applied to *BOTH* the pane and its resizer when a pane is 'slid open'
            ,	pane_animate:			1000		// applied to the pane when being animated - not applied to the resizer
            ,	resizer_drag:			2		// applied to the CLONED resizer-bar when being 'dragged'
        }
        ,	errors: {
            pane:					"pane"		// description of "layout pane element" - used only in error messages
            ,	selector:				"selector"	// description of "jQuery-selector" - used only in error messages
            ,	addButtonError:			"Error Adding Button\nInvalid "
            ,	containerMissing:		"UI Layout Initialization Error\nThe specified layout-container does not exist."
            ,	centerPaneMissing:		"UI Layout Initialization Error\nThe center-pane element does not exist.\nThe center-pane is a required element."
            ,	noContainerHeight:		"UI Layout Initialization Warning\nThe layout-container \"CONTAINER\" has no height.\nTherefore the layout is 0-height and hence 'invisible'!"
            ,	callbackError:			"UI Layout Callback Error\nThe EVENT callback is not a valid function."
        }
        /*
         *	PANE DEFAULT SETTINGS
         *	- settings under the 'panes' key become the default settings for *all panes*
         *	- ALL pane-options can also be set specifically for each panes, which will override these 'default values'
         */
        ,	panes: { // default options for 'all panes' - will be overridden by 'per-pane settings'
            applyDemoStyles: 		false		// NOTE: renamed from applyDefaultStyles for clarity
            ,	closable:				true		// pane can open & close
            ,	resizable:				true		// when open, pane can be resized
            ,	slidable:				true		// when closed, pane can 'slide open' over other panes - closes on mouse-out
            ,	initClosed:				false		// true = init pane as 'closed'
            ,	initHidden: 			false 		// true = init pane as 'hidden' - no resizer-bar/spacing
            //	SELECTORS
            //,	paneSelector:			""			// MUST be pane-specific - jQuery selector for pane
            ,	contentSelector:		".ui-layout-content" // INNER div/element to auto-size so only it scrolls, not the entire pane!
            ,	contentIgnoreSelector:	".ui-layout-ignore"	// element(s) to 'ignore' when measuring 'content'
            ,	findNestedContent:		false		// true = $P.findAll(contentSelector), false = $P.children(contentSelector)
            //	GENERIC ROOT-CLASSES - for auto-generated classNames
            ,	paneClass:				"ui-layout-pane"	// Layout Pane
            ,	resizerClass:			"ui-layout-resizer"	// Resizer Bar
            ,	togglerClass:			"ui-layout-toggler"	// Toggler Button
            ,	buttonClass:			"ui-layout-button"	// CUSTOM Buttons	- eg: '[ui-layout-button]-toggle/-open/-close/-pin'
            //	ELEMENT SIZE & SPACING
            //,	size:					100			// MUST be pane-specific -initial size of pane
            ,	minSize:				0			// when manually resizing a pane
            ,	maxSize:				0			// ditto, 0 = no limit
            ,	spacing_open:			6			// space between pane and adjacent panes - when pane is 'open'
            ,	spacing_closed:			6			// ditto - when pane is 'closed'
            ,	togglerLength_open:		50			// Length = WIDTH of toggler button on north/south sides - HEIGHT on east/west sides
            ,	togglerLength_closed: 	50			// 100% OR -1 means 'full height/width of resizer bar' - 0 means 'hidden'
            ,	togglerAlign_open:		"center"	// top/left, bottom/right, center, OR...
            ,	togglerAlign_closed:	"center"	// 1 => nn = offset from top/left, -1 => -nn == offset from bottom/right
            ,	togglerContent_open:	""			// text or HTML to put INSIDE the toggler
            ,	togglerContent_closed:	""			// ditto
            //	RESIZING OPTIONS
            ,	resizerDblClickToggle:	true		//
            ,	autoResize:				true		// IF size is 'auto' or a percentage, then recalc 'pixel size' whenever the layout resizes
            ,	autoReopen:				true		// IF a pane was auto-closed due to noRoom, reopen it when there is room? False = leave it closed
            ,	resizerDragOpacity:		1			// option for ui.draggable
            //,	resizerCursor:			""			// MUST be pane-specific - cursor when over resizer-bar
            ,	maskContents:			false		// true = add DIV-mask over-or-inside this pane so can 'drag' over IFRAMES
            ,	maskObjects:			false		// true = add IFRAME-mask over-or-inside this pane to cover objects/applets - content-mask will overlay this mask
            ,	maskZindex:				null		// will override zIndexes.content_mask if specified - not applicable to iframe-panes
            ,	resizingGrid:			false		// grid size that the resizers will snap-to during resizing, eg: [20,20]
            ,	livePaneResizing:		false		// true = LIVE Resizing as resizer is dragged
            ,	liveContentResizing:	false		// true = re-measure header/footer heights as resizer is dragged
            ,	liveResizingTolerance:	1			// how many px change before pane resizes, to control performance
            //	SLIDING OPTIONS
            ,	sliderCursor:			"pointer"	// cursor when resizer-bar will trigger 'sliding'
            ,	slideTrigger_open:		"click"		// click, dblclick, mouseenter
            ,	slideTrigger_close:		"mouseleave"// click, mouseleave
            ,	slideDelay_open:		300			// applies only for mouseenter event - 0 = instant open
            ,	slideDelay_close:		300			// applies only for mouseleave event (300ms is the minimum!)
            ,	hideTogglerOnSlide:		false		// when pane is slid-open, should the toggler show?
            ,	preventQuickSlideClose:	$.layout.browser.webkit // Chrome triggers slideClosed as it is opening
            ,	preventPrematureSlideClose: false	// handle incorrect mouseleave trigger, like when over a SELECT-list in IE
            //	PANE-SPECIFIC TIPS & MESSAGES
            ,	tips: {
                Open:				"Open"		// eg: "Open Pane"
                ,	Close:				"Close"
                ,	Resize:				"Resize"
                ,	Slide:				"Slide Open"
                ,	Pin:				"Pin"
                ,	Unpin:				"Un-Pin"
                ,	noRoomToOpen:		"Not enough room to show this panel."	// alert if user tries to open a pane that cannot
                ,	minSizeWarning:		"Panel has reached its minimum size"	// displays in browser statusbar
                ,	maxSizeWarning:		"Panel has reached its maximum size"	// ditto
            }
            //	HOT-KEYS & MISC
            ,	showOverflowOnHover:	false		// will bind allowOverflow() utility to pane.onMouseOver
            ,	enableCursorHotkey:		true		// enabled 'cursor' hotkeys
            //,	customHotkey:			""			// MUST be pane-specific - EITHER a charCode OR a character
            ,	customHotkeyModifier:	"SHIFT"		// either 'SHIFT', 'CTRL' or 'CTRL+SHIFT' - NOT 'ALT'
            //	PANE ANIMATION
            //	NOTE: fxSss_open, fxSss_close & fxSss_size options (eg: fxName_open) are auto-generated if not passed
            ,	fxName:					"slide" 	// ('none' or blank), slide, drop, scale -- only relevant to 'open' & 'close', NOT 'size'
            ,	fxSpeed:				null		// slow, normal, fast, 200, nnn - if passed, will OVERRIDE fxSettings.duration
            ,	fxSettings:				{}			// can be passed, eg: { easing: "easeOutBounce", duration: 1500 }
            ,	fxOpacityFix:			true		// tries to fix opacity in IE to restore anti-aliasing after animation
            ,	animatePaneSizing:		false		// true = animate resizing after dragging resizer-bar OR sizePane() is called
            /*  NOTE: Action-specific FX options are auto-generated from the options above if not specifically set:
             fxName_open:			"slide"		// 'Open' pane animation
             fnName_close:			"slide"		// 'Close' pane animation
             fxName_size:			"slide"		// 'Size' pane animation - when animatePaneSizing = true
             fxSpeed_open:			null
             fxSpeed_close:			null
             fxSpeed_size:			null
             fxSettings_open:		{}
             fxSettings_close:		{}
             fxSettings_size:		{}
             */
            //	CHILD/NESTED LAYOUTS
            ,	children:				null		// Layout-options for nested/child layout - even {} is valid as options
            ,	containerSelector:		''			// if child is NOT 'directly nested', a selector to findAll it/them (can have more than one child layout!)
            ,	initChildren:			true		// true = child layout will be created as soon as _this_ layout completes initialization
            ,	destroyChildren:		true		// true = destroy child-layout if this pane is destroyed
            ,	resizeChildren:			true		// true = trigger child-layout.resizeAll() when this pane is resized
            //	EVENT TRIGGERING
            ,	triggerEventsOnLoad:	false		// true = trigger onopen OR onclose callbacks when layout initializes
            ,	triggerEventsDuringLiveResize: true	// true = trigger onresize callback REPEATEDLY if livePaneResizing==true
            //	PANE CALLBACKS
            ,	onshow_start:			null		// CALLBACK when pane STARTS to Show	- BEFORE onopen/onhide_start
            ,	onshow_end:				null		// CALLBACK when pane ENDS being Shown	- AFTER  onopen/onhide_end
            ,	onhide_start:			null		// CALLBACK when pane STARTS to Close	- BEFORE onclose_start
            ,	onhide_end:				null		// CALLBACK when pane ENDS being Closed	- AFTER  onclose_end
            ,	onopen_start:			null		// CALLBACK when pane STARTS to Open
            ,	onopen_end:				null		// CALLBACK when pane ENDS being Opened
            ,	onclose_start:			null		// CALLBACK when pane STARTS to Close
            ,	onclose_end:			null		// CALLBACK when pane ENDS being Closed
            ,	onresize_start:			null		// CALLBACK when pane STARTS being Resized ***FOR ANY REASON***
            ,	onresize_end:			null		// CALLBACK when pane ENDS being Resized ***FOR ANY REASON***
            ,	onsizecontent_start:	null		// CALLBACK when sizing of content-element STARTS
            ,	onsizecontent_end:		null		// CALLBACK when sizing of content-element ENDS
            ,	onswap_start:			null		// CALLBACK when pane STARTS to Swap
            ,	onswap_end:				null		// CALLBACK when pane ENDS being Swapped
            ,	ondrag_start:			null		// CALLBACK when pane STARTS being ***MANUALLY*** Resized
            ,	ondrag_end:				null		// CALLBACK when pane ENDS being ***MANUALLY*** Resized
        }
        /*
         *	PANE-SPECIFIC SETTINGS
         *	- options listed below MUST be specified per-pane - they CANNOT be set under 'panes'
         *	- all options under the 'panes' key can also be set specifically for any pane
         *	- most options under the 'panes' key apply only to 'border-panes' - NOT the the center-pane
         */
        ,	north: {
            paneSelector:			".ui-layout-north"
            ,	size:					"auto"		// eg: "auto", "30%", .30, 200
            ,	resizerCursor:			"n-resize"	// custom = url(myCursor.cur)
            ,	customHotkey:			""			// EITHER a charCode (43) OR a character ("o")
        }
        ,	south: {
            paneSelector:			".ui-layout-south"
            ,	size:					"auto"
            ,	resizerCursor:			"s-resize"
            ,	customHotkey:			""
        }
        ,	east: {
            paneSelector:			".ui-layout-east"
            ,	size:					200
            ,	resizerCursor:			"e-resize"
            ,	customHotkey:			""
        }
        ,	west: {
            paneSelector:			".ui-layout-west"
            ,	size:					200
            ,	resizerCursor:			"w-resize"
            ,	customHotkey:			""
        }
        ,	center: {
            paneSelector:			".ui-layout-center"
            ,	minWidth:				0
            ,	minHeight:				0
        }
    };

    $.layout.optionsMap = {
        // layout/global options - NOT pane-options
        layout: ("name,instanceKey,stateManagement,effects,inset,zIndexes,errors,"
            +	"zIndex,scrollToBookmarkOnLoad,showErrorMessages,maskPanesEarly,"
            +	"outset,resizeWithWindow,resizeWithWindowDelay,resizeWithWindowMaxDelay,"
            +	"onresizeall,onresizeall_start,onresizeall_end,onload,onload_start,onload_end,onunload,onunload_start,onunload_end").split(",")
//	borderPanes: [ ALL options that are NOT specified as 'layout' ]
        // default.panes options that apply to the center-pane (most options apply _only_ to border-panes)
        ,	center: ("paneClass,contentSelector,contentIgnoreSelector,findNestedContent,applyDemoStyles,triggerEventsOnLoad,"
            +	"showOverflowOnHover,maskContents,maskObjects,liveContentResizing,"
            +	"containerSelector,children,initChildren,resizeChildren,destroyChildren,"
            +	"onresize,onresize_start,onresize_end,onsizecontent,onsizecontent_start,onsizecontent_end").split(",")
        // options that MUST be specifically set 'per-pane' - CANNOT set in the panes (defaults) key
        ,	noDefault: ("paneSelector,resizerCursor,customHotkey").split(",")
    };

    /**
     * Processes options passed in converts flat-format data into subkey (JSON) format
     * In flat-format, subkeys are _currently_ separated with 2 underscores, like north__optName
     * Plugins may also call this method so they can transform their own data
     *
     * @param  {!Object}	hash			Data/options passed by user - may be a single level or nested levels
     * @param  {boolean=}	[addKeys=false]	Should the primary layout.options keys be added if they do not exist?
     * @return {Object}						Returns hash of minWidth & minHeight
     */
    $.layout.transformData = function (hash, addKeys) {
        var	json = addKeys ? { panes: {}, center: {} } : {} // init return object
            ,	branch, optKey, keys, key, val, i, c;

        if (typeof hash !== "object") return json; // no options passed

        // convert all 'flat-keys' to 'sub-key' format
        for (optKey in hash) {
            branch	= json;
            val		= hash[ optKey ];
            keys	= optKey.split("__"); // eg: west__size or north__fxSettings__duration
            c		= keys.length - 1;
            // convert underscore-delimited to subkeys
            for (i=0; i <= c; i++) {
                key = keys[i];
                if (i === c) {	// last key = value
                    if ($.isPlainObject( val ))
                        branch[key] = $.layout.transformData( val ); // RECURSE
                    else
                        branch[key] = val;
                }
                else {
                    if (!branch[key])
                        branch[key] = {}; // create the subkey
                    // recurse to sub-key for next loop - if not done
                    branch = branch[key];
                }
            }
        }
        return json;
    };

// INTERNAL CONFIG DATA - DO NOT CHANGE THIS!
    $.layout.backwardCompatibility = {
        // data used by renameOldOptions()
        map: {
            //	OLD Option Name:			NEW Option Name
            applyDefaultStyles:			"applyDemoStyles"
            //	CHILD/NESTED LAYOUTS
            ,	childOptions:				"children"
            ,	initChildLayout:			"initChildren"
            ,	destroyChildLayout:			"destroyChildren"
            ,	resizeChildLayout:			"resizeChildren"
            ,	resizeNestedLayout:			"resizeChildren"
            //	MISC Options
            ,	resizeWhileDragging:		"livePaneResizing"
            ,	resizeContentWhileDragging:	"liveContentResizing"
            ,	triggerEventsWhileDragging:	"triggerEventsDuringLiveResize"
            ,	maskIframesOnResize:		"maskContents"
            //	STATE MANAGEMENT
            ,	useStateCookie:				"stateManagement.enabled"
            ,	"cookie.autoLoad":			"stateManagement.autoLoad"
            ,	"cookie.autoSave":			"stateManagement.autoSave"
            ,	"cookie.keys":				"stateManagement.stateKeys"
            ,	"cookie.name":				"stateManagement.cookie.name"
            ,	"cookie.domain":			"stateManagement.cookie.domain"
            ,	"cookie.path":				"stateManagement.cookie.path"
            ,	"cookie.expires":			"stateManagement.cookie.expires"
            ,	"cookie.secure":			"stateManagement.cookie.secure"
            //	OLD Language options
            ,	noRoomToOpenTip:			"tips.noRoomToOpen"
            ,	togglerTip_open:			"tips.Close"	// open   = Close
            ,	togglerTip_closed:			"tips.Open"		// closed = Open
            ,	resizerTip:					"tips.Resize"
            ,	sliderTip:					"tips.Slide"
        }

        /**
         * @param {Object}	opts
         */
        ,	renameOptions: function (opts) {
            var map = $.layout.backwardCompatibility.map
                ,	oldData, newData, value
                ;
            for (var itemPath in map) {
                oldData	= getBranch( itemPath );
                value	= oldData.branch[ oldData.key ];
                if (value !== undefined) {
                    newData = getBranch( map[itemPath], true );
                    newData.branch[ newData.key ] = value;
                    delete oldData.branch[ oldData.key ];
                }
            }

            /**
             * @param {string}	path
             * @param {boolean=}	[create=false]	Create path if does not exist
             */
            function getBranch (path, create) {
                var a = path.split(".") // split keys into array
                    ,	c = a.length - 1
                    ,	D = { branch: opts, key: a[c] } // init branch at top & set key (last item)
                    ,	i = 0, k, undef;
                for (; i<c; i++) { // skip the last key (data)
                    k = a[i];
                    if (D.branch[ k ] == undefined) { // child-key does not exist
                        if (create) {
                            D.branch = D.branch[ k ] = {}; // create child-branch
                        }
                        else // can't go any farther
                            D.branch = {}; // branch is undefined
                    }
                    else
                        D.branch = D.branch[ k ]; // get child-branch
                }
                return D;
            };
        }

        /**
         * @param {Object}	opts
         */
        ,	renameAllOptions: function (opts) {
            var ren = $.layout.backwardCompatibility.renameOptions;
            // rename root (layout) options
            ren( opts );
            // rename 'defaults' to 'panes'
            if (opts.defaults) {
                if (typeof opts.panes !== "object")
                    opts.panes = {};
                $.extend(true, opts.panes, opts.defaults);
                delete opts.defaults;
            }
            // rename options in the the options.panes key
            if (opts.panes) ren( opts.panes );
            // rename options inside *each pane key*, eg: options.west
            $.each($.layout.config.allPanes, function (i, pane) {
                if (opts[pane]) ren( opts[pane] );
            });
            return opts;
        }
    };




    /*	============================================================
     *	BEGIN WIDGET: $( selector ).layout( {options} );
     *	============================================================
     */
    $.fn.layout = function (opts) {
        var

        // local aliases to global data
            browser	= $.layout.browser
            ,	_c		= $.layout.config

        // local aliases to utlity methods
            ,	cssW	= $.layout.cssWidth
            ,	cssH	= $.layout.cssHeight
            ,	elDims	= $.layout.getElementDimensions
            ,	styles	= $.layout.getElementStyles
            ,	evtObj	= $.layout.getEventObject
            ,	evtPane	= $.layout.parsePaneName

        /**
         * options - populated by initOptions()
         */
            ,	options = $.extend(true, {}, $.layout.defaults)
            ,	effects	= options.effects = $.extend(true, {}, $.layout.effects)

        /**
         * layout-status object
         */
            ,	state = {
                // generate unique ID to use for event.namespace so can unbind only events added by 'this layout'
                id:				"layout"+ $.now()	// code uses alias: sID
                ,	initialized:	false
                ,	paneResizing:	false
                ,	panesSliding:	{}
                ,	container:	{ 	// list all keys referenced in code to avoid compiler error msgs
                    innerWidth:		0
                    ,	innerHeight:	0
                    ,	outerWidth:		0
                    ,	outerHeight:	0
                    ,	layoutWidth:	0
                    ,	layoutHeight:	0
                }
                ,	north:		{ childIdx: 0 }
                ,	south:		{ childIdx: 0 }
                ,	east:		{ childIdx: 0 }
                ,	west:		{ childIdx: 0 }
                ,	center:		{ childIdx: 0 }
            }

        /**
         * parent/child-layout pointers
         */
//,	hasParentLayout	= false	- exists ONLY inside Instance so can be set externally
            ,	children = {
                north:		null
                ,	south:		null
                ,	east:		null
                ,	west:		null
                ,	center:		null
            }

        /*
         * ###########################
         *  INTERNAL HELPER FUNCTIONS
         * ###########################
         */

        /**
         * Manages all internal timers
         */
            ,	timer = {
                data:	{}
                ,	set:	function (s, fn, ms) { timer.clear(s); timer.data[s] = setTimeout(fn, ms); }
                ,	clear:	function (s) { var t=timer.data; if (t[s]) {clearTimeout(t[s]); delete t[s];} }
            }

        /**
         * Alert or console.log a message - IF option is enabled.
         *
         * @param {(string|!Object)}	msg				Message (or debug-data) to display
         * @param {boolean=}			[popup=false]	True by default, means 'alert', false means use console.log
         * @param {boolean=}			[debug=false]	True means is a widget debugging message
         */
            ,	_log = function (msg, popup, debug) {
                var o = options;
                if ((o.showErrorMessages && !debug) || (debug && o.showDebugMessages))
                    $.layout.msg( o.name +' / '+ msg, (popup !== false) );
                return false;
            }

        /**
         * Executes a Callback function after a trigger event, like resize, open or close
         *
         * @param {string}				evtName					Name of the layout callback, eg "onresize_start"
         * @param {(string|boolean)=}	[pane=""]				This is passed only so we can pass the 'pane object' to the callback
         * @param {(string|boolean)=}	[skipBoundEvents=false]	True = do not run events bound to the elements - only the callbacks set in options
         */
            ,	_runCallbacks = function (evtName, pane, skipBoundEvents) {
                var	hasPane	= pane && isStr(pane)
                    ,	s		= hasPane ? state[pane] : state
                    ,	o		= hasPane ? options[pane] : options
                    ,	lName	= options.name
                // names like onopen and onopen_end separate are interchangeable in options...
                    ,	lng		= evtName + (evtName.match(/_/) ? "" : "_end")
                    ,	shrt	= lng.match(/_end$/) ? lng.substr(0, lng.length - 4) : ""
                    ,	fn		= o[lng] || o[shrt]
                    ,	retVal	= "NC" // NC = No Callback
                    ,	args	= []
                    ,	$P
                    ;
                if ( !hasPane && $.type(pane) === 'boolean' ) {
                    skipBoundEvents = pane; // allow pane param to be skipped for Layout callback
                    pane = "";
                }

                // first trigger the callback set in the options
                if (fn) {
                    try {
                        // convert function name (string) to function object
                        if (isStr( fn )) {
                            if (fn.match(/,/)) {
                                // function name cannot contain a comma,
                                // so must be a function name AND a parameter to pass
                                args = fn.split(",")
                                    ,	fn = eval(args[0]);
                            }
                            else // just the name of an external function?
                                fn = eval(fn);
                        }
                        // execute the callback, if exists
                        if ($.isFunction( fn )) {
                            if (args.length)
                                retVal = g(fn)(args[1]); // pass the argument parsed from 'list'
                            else if ( hasPane )
                            // pass data: pane-name, pane-element, pane-status, pane-options, and layout-name
                                retVal = g(fn)( pane, $Ps[pane], s, o, lName );
                            else // must be a layout/container callback - pass suitable info
                                retVal = g(fn)( Instance, s, o, lName );
                        }
                    }
                    catch (ex) {
                        _log( options.errors.callbackError.replace(/EVENT/, $.trim((pane || "") +" "+ lng)), false );
                        if ($.type(ex) === 'string' && string.length)
                            _log('Exception:  '+ ex, false );
                    }
                }

                // trigger additional events bound directly to the pane
                if (!skipBoundEvents && retVal !== false) {
                    if ( hasPane ) { // PANE events can be bound to each pane-elements
                        $P	= $Ps[pane];
                        o	= options[pane];
                        s	= state[pane];
                        $P.triggerHandler('layoutpane'+ lng, [ pane, $P, s, o, lName ]);
                        if (shrt)
                            $P.triggerHandler('layoutpane'+ shrt, [ pane, $P, s, o, lName ]);
                    }
                    else { // LAYOUT events can be bound to the container-element
                        $N.triggerHandler('layout'+ lng, [ Instance, s, o, lName ]);
                        if (shrt)
                            $N.triggerHandler('layout'+ shrt, [ Instance, s, o, lName ]);
                    }
                }

                // ALWAYS resizeChildren after an onresize_end event - even during initialization
                // IGNORE onsizecontent_end event because causes child-layouts to resize TWICE
                if (hasPane && evtName === "onresize_end") // BAD: || evtName === "onsizecontent_end"
                    resizeChildren(pane+"", true); // compiler hack -force string

                return retVal;

                function g (f) { return f; }; // compiler hack
            }


        /**
         * cure iframe display issues in IE & other browsers
         */
            ,	_fixIframe = function (pane) {
                if (browser.mozilla) return; // skip FireFox - it auto-refreshes iframes onShow
                var $P = $Ps[pane];
                // if the 'pane' is an iframe, do it
                if (state[pane].tagName === "IFRAME")
                    $P.css(_c.hidden).css(_c.visible);
                else // ditto for any iframes INSIDE the pane
                    $P.find('IFRAME').css(_c.hidden).css(_c.visible);
            }

        /**
         * @param  {string}		pane		Can accept ONLY a 'pane' (east, west, etc)
         * @param  {number=}		outerSize	(optional) Can pass a width, allowing calculations BEFORE element is resized
         * @return {number}		Returns the innerHeight/Width of el by subtracting padding and borders
         */
            ,	cssSize = function (pane, outerSize) {
                var fn = _c[pane].dir=="horz" ? cssH : cssW;
                return fn($Ps[pane], outerSize);
            }

        /**
         * @param  {string}		pane		Can accept ONLY a 'pane' (east, west, etc)
         * @return {Object}		Returns hash of minWidth & minHeight
         */
            ,	cssMinDims = function (pane) {
                // minWidth/Height means CSS width/height = 1px
                var	$P	= $Ps[pane]
                    ,	dir	= _c[pane].dir
                    ,	d	= {
                        minWidth:	1001 - cssW($P, 1000)
                        ,	minHeight:	1001 - cssH($P, 1000)
                    }
                    ;
                if (dir === "horz") d.minSize = d.minHeight;
                if (dir === "vert") d.minSize = d.minWidth;

                return d;
            }

        // TODO: see if these methods can be made more useful...
        // TODO: *maybe* return cssW/H from these so caller can use this info

        /**
         * @param {(string|!Object)}		el
         * @param {number=}				outerWidth
         * @param {boolean=}				[autoHide=false]
         */
            ,	setOuterWidth = function (el, outerWidth, autoHide) {
                var $E = el, w;
                if (isStr(el)) $E = $Ps[el]; // west
                else if (!el.jquery) $E = $(el);
                w = cssW($E, outerWidth);
                $E.css({ width: w });
                if (w > 0) {
                    if (autoHide && $E.data('autoHidden') && $E.innerHeight() > 0) {
                        $E.show().data('autoHidden', false);
                        if (!browser.mozilla) // FireFox refreshes iframes - IE does not
                        // make hidden, then visible to 'refresh' display after animation
                            $E.css(_c.hidden).css(_c.visible);
                    }
                }
                else if (autoHide && !$E.data('autoHidden'))
                    $E.hide().data('autoHidden', true);
            }

        /**
         * @param {(string|!Object)}		el
         * @param {number=}				outerHeight
         * @param {boolean=}				[autoHide=false]
         */
            ,	setOuterHeight = function (el, outerHeight, autoHide) {
                var $E = el, h;
                if (isStr(el)) $E = $Ps[el]; // west
                else if (!el.jquery) $E = $(el);
                h = cssH($E, outerHeight);
                $E.css({ height: h, visibility: "visible" }); // may have been 'hidden' by sizeContent
                if (h > 0 && $E.innerWidth() > 0) {
                    if (autoHide && $E.data('autoHidden')) {
                        $E.show().data('autoHidden', false);
                        if (!browser.mozilla) // FireFox refreshes iframes - IE does not
                            $E.css(_c.hidden).css(_c.visible);
                    }
                }
                else if (autoHide && !$E.data('autoHidden'))
                    $E.hide().data('autoHidden', true);
            }


        /**
         * Converts any 'size' params to a pixel/integer size, if not already
         * If 'auto' or a decimal/percentage is passed as 'size', a pixel-size is calculated
         *
         /**
         * @param  {string}				pane
         * @param  {(string|number)=}	size
         * @param  {string=}				[dir]
         * @return {number}
         */
            ,	_parseSize = function (pane, size, dir) {
                if (!dir) dir = _c[pane].dir;

                if (isStr(size) && size.match(/%/))
                    size = (size === '100%') ? -1 : parseInt(size, 10) / 100; // convert % to decimal

                if (size === 0)
                    return 0;
                else if (size >= 1)
                    return parseInt(size, 10);

                var o = options, avail = 0;
                if (dir=="horz") // north or south or center.minHeight
                    avail = sC.innerHeight - ($Ps.north ? o.north.spacing_open : 0) - ($Ps.south ? o.south.spacing_open : 0);
                else if (dir=="vert") // east or west or center.minWidth
                    avail = sC.innerWidth - ($Ps.west ? o.west.spacing_open : 0) - ($Ps.east ? o.east.spacing_open : 0);

                if (size === -1) // -1 == 100%
                    return avail;
                else if (size > 0) // percentage, eg: .25
                    return round(avail * size);
                else if (pane=="center")
                    return 0;
                else { // size < 0 || size=='auto' || size==Missing || size==Invalid
                    // auto-size the pane
                    var	dim	= (dir === "horz" ? "height" : "width")
                        ,	$P	= $Ps[pane]
                        ,	$C	= dim === 'height' ? $Cs[pane] : false
                        ,	vis	= $.layout.showInvisibly($P) // show pane invisibly if hidden
                        ,	szP	= $P.css(dim) // SAVE current pane size
                        ,	szC	= $C ? $C.css(dim) : 0 // SAVE current content size
                        ;
                    $P.css(dim, "auto");
                    if ($C) $C.css(dim, "auto");
                    size = (dim === "height") ? $P.outerHeight() : $P.outerWidth(); // MEASURE
                    $P.css(dim, szP).css(vis); // RESET size & visibility
                    if ($C) $C.css(dim, szC);
                    return size;
                }
            }

        /**
         * Calculates current 'size' (outer-width or outer-height) of a border-pane - optionally with 'pane-spacing' added
         *
         * @param  {(string|!Object)}	pane
         * @param  {boolean=}			[inclSpace=false]
         * @return {number}				Returns EITHER Width for east/west panes OR Height for north/south panes
         */
            ,	getPaneSize = function (pane, inclSpace) {
                var
                    $P	= $Ps[pane]
                    ,	o	= options[pane]
                    ,	s	= state[pane]
                    ,	oSp	= (inclSpace ? o.spacing_open : 0)
                    ,	cSp	= (inclSpace ? o.spacing_closed : 0)
                    ;
                if (!$P || s.isHidden)
                    return 0;
                else if (s.isClosed || (s.isSliding && inclSpace))
                    return cSp;
                else if (_c[pane].dir === "horz")
                    return $P.outerHeight() + oSp;
                else // dir === "vert"
                    return $P.outerWidth() + oSp;
            }

        /**
         * Calculate min/max pane dimensions and limits for resizing
         *
         * @param  {string}		pane
         * @param  {boolean=}	[slide=false]
         */
            ,	setSizeLimits = function (pane, slide) {
                if (!isInitialized()) return;
                var
                    o				= options[pane]
                    ,	s				= state[pane]
                    ,	c				= _c[pane]
                    ,	dir				= c.dir
                    ,	type			= c.sizeType.toLowerCase()
                    ,	isSliding		= (slide != undefined ? slide : s.isSliding) // only open() passes 'slide' param
                    ,	$P				= $Ps[pane]
                    ,	paneSpacing		= o.spacing_open
                //	measure the pane on the *opposite side* from this pane
                    ,	altPane			= _c.oppositeEdge[pane]
                    ,	altS			= state[altPane]
                    ,	$altP			= $Ps[altPane]
                    ,	altPaneSize		= (!$altP || altS.isVisible===false || altS.isSliding ? 0 : (dir=="horz" ? $altP.outerHeight() : $altP.outerWidth()))
                    ,	altPaneSpacing	= ((!$altP || altS.isHidden ? 0 : options[altPane][ altS.isClosed !== false ? "spacing_closed" : "spacing_open" ]) || 0)
                //	limitSize prevents this pane from 'overlapping' opposite pane
                    ,	containerSize	= (dir=="horz" ? sC.innerHeight : sC.innerWidth)
                    ,	minCenterDims	= cssMinDims("center")
                    ,	minCenterSize	= dir=="horz" ? max(options.center.minHeight, minCenterDims.minHeight) : max(options.center.minWidth, minCenterDims.minWidth)
                //	if pane is 'sliding', then ignore center and alt-pane sizes - because 'overlays' them
                    ,	limitSize		= (containerSize - paneSpacing - (isSliding ? 0 : (_parseSize("center", minCenterSize, dir) + altPaneSize + altPaneSpacing)))
                    ,	minSize			= s.minSize = max( _parseSize(pane, o.minSize), cssMinDims(pane).minSize )
                    ,	maxSize			= s.maxSize = min( (o.maxSize ? _parseSize(pane, o.maxSize) : 100000), limitSize )
                    ,	r				= s.resizerPosition = {} // used to set resizing limits
                    ,	top				= sC.inset.top
                    ,	left			= sC.inset.left
                    ,	W				= sC.innerWidth
                    ,	H				= sC.innerHeight
                    ,	rW				= o.spacing_open // subtract resizer-width to get top/left position for south/east
                    ;
                switch (pane) {
                    case "north":	r.min = top + minSize;
                        r.max = top + maxSize;
                        break;
                    case "west":	r.min = left + minSize;
                        r.max = left + maxSize;
                        break;
                    case "south":	r.min = top + H - maxSize - rW;
                        r.max = top + H - minSize - rW;
                        break;
                    case "east":	r.min = left + W - maxSize - rW;
                        r.max = left + W - minSize - rW;
                        break;
                };
            }

        /**
         * Returns data for setting the size/position of center pane. Also used to set Height for east/west panes
         *
         * @return JSON  Returns a hash of all dimensions: top, bottom, left, right, (outer) width and (outer) height
         */
            ,	calcNewCenterPaneDims = function () {
                var d = {
                    top:	getPaneSize("north", true) // true = include 'spacing' value for pane
                    ,	bottom:	getPaneSize("south", true)
                    ,	left:	getPaneSize("west", true)
                    ,	right:	getPaneSize("east", true)
                    ,	width:	0
                    ,	height:	0
                };

                // NOTE: sC = status.container
                // calc center-pane outer dimensions
                d.width		= sC.innerWidth - d.left - d.right;  // outerWidth
                d.height	= sC.innerHeight - d.bottom - d.top; // outerHeight
                // add the 'container border/padding' to get final positions relative to the container
                d.top		+= sC.inset.top;
                d.bottom	+= sC.inset.bottom;
                d.left		+= sC.inset.left;
                d.right		+= sC.inset.right;


                return d;
            }


        /**
         * @param {!Object}		el
         * @param {boolean=}		[allStates=false]
         */
            ,	getHoverClasses = function (el, allStates) {
                var
                    $El		= $(el)
                    ,	type	= $El.data("layoutRole")
                    ,	pane	= $El.data("layoutEdge")
                    ,	o		= options[pane]
                    ,	root	= o[type +"Class"]
                    ,	_pane	= "-"+ pane // eg: "-west"
                    ,	_open	= "-open"
                    ,	_closed	= "-closed"
                    ,	_slide	= "-sliding"
                    ,	_hover	= "-hover " // NOTE the trailing space
                    ,	_state	= $El.hasClass(root+_closed) ? _closed : _open
                    ,	_alt	= _state === _closed ? _open : _closed
                    ,	classes = (root+_hover) + (root+_pane+_hover) + (root+_state+_hover) + (root+_pane+_state+_hover)
                    ;
                if (allStates) // when 'removing' classes, also remove alternate-status classes
                    classes += (root+_alt+_hover) + (root+_pane+_alt+_hover);

                if (type=="resizer" && $El.hasClass(root+_slide))
                    classes += (root+_slide+_hover) + (root+_pane+_slide+_hover);

                return $.trim(classes);
            }
            ,	addHover	= function (evt, el) {
                var $E = $(el || this);
                if (evt && $E.data("layoutRole") === "toggler")
                    evt.stopPropagation(); // prevent triggering 'slide' on Resizer-bar
                $E.addClass( getHoverClasses($E) );
            }
            ,	removeHover	= function (evt, el) {
                var $E = $(el || this);
                $E.removeClass( getHoverClasses($E, true) );
            }

            ,	onResizerEnter	= function (evt) { // ALSO called by toggler.mouseenter
                var pane	= $(this).data("layoutEdge")
                    ,	s		= state[pane]
                    ;
                // ignore closed-panes and mouse moving back & forth over resizer!
                // also ignore if ANY pane is currently resizing
                if ( s.isClosed || s.isResizing || state.paneResizing ) return;

                if ($.fn.disableSelection)
                    $("body").disableSelection();
                if (options.maskPanesEarly)
                    showMasks( pane, { resizing: true });
            }
            ,	onResizerLeave	= function (evt, el) {
                var	e		= el || this // el is only passed when called by the timer
                    ,	pane	= $(e).data("layoutEdge")
                    ,	name	= pane +"ResizerLeave"
                    ;
                timer.clear(pane+"_openSlider"); // cancel slideOpen timer, if set
                timer.clear(name); // cancel enableSelection timer - may re/set below
                // this method calls itself on a timer because it needs to allow
                // enough time for dragging to kick-in and set the isResizing flag
                // dragging has a 100ms delay set, so this delay must be >100
                if (!el) // 1st call - mouseleave event
                    timer.set(name, function(){ onResizerLeave(evt, e); }, 200);
                // if user is resizing, then dragStop will enableSelection(), so can skip it here
                else if ( !state.paneResizing ) { // 2nd call - by timer
                    if ($.fn.enableSelection)
                        $("body").enableSelection();
                    if (options.maskPanesEarly)
                        hideMasks();
                }
            }

        /*
         * ###########################
         *   INITIALIZATION METHODS
         * ###########################
         */

        /**
         * Initialize the layout - called automatically whenever an instance of layout is created
         *
         * @see  none - triggered onInit
         * @return  mixed	true = fully initialized | false = panes not initialized (yet) | 'cancel' = abort
         */
            ,	_create = function () {
                // initialize config/options
                initOptions();
                var o = options
                    ,	s = state;

                // TEMP status so isInitialized returns true during init process
                s.creatingLayout = true;

                // init plugins for this layout, if there are any (eg: stateManagement)
                runPluginCallbacks( Instance, $.layout.onCreate );

                // options & status have been initialized, so now run beforeLoad callback
                // onload will CANCEL layout creation if it returns false
                if (false === _runCallbacks("onload_start"))
                    return 'cancel';

                // initialize the container element
                _initContainer();

                // bind hotkey function - keyDown - if required
                initHotkeys();

                // bind window.onunload
                $(window).bind("unload."+ sID, unload);

                // init plugins for this layout, if there are any (eg: customButtons)
                runPluginCallbacks( Instance, $.layout.onLoad );

                // if layout elements are hidden, then layout WILL NOT complete initialization!
                // initLayoutElements will set initialized=true and run the onload callback IF successful
                if (o.initPanes) _initLayoutElements();

                delete s.creatingLayout;

                return state.initialized;
            }

        /**
         * Initialize the layout IF not already
         *
         * @see  All methods in Instance run this test
         * @return  boolean	true = layoutElements have been initialized | false = panes are not initialized (yet)
         */
            ,	isInitialized = function () {
                if (state.initialized || state.creatingLayout) return true;	// already initialized
                else return _initLayoutElements();	// try to init panes NOW
            }

        /**
         * Initialize the layout - called automatically whenever an instance of layout is created
         *
         * @see  _create() & isInitialized
         * @param {boolean=}		[retry=false]	// indicates this is a 2nd try
         * @return  An object pointer to the instance created
         */
            ,	_initLayoutElements = function (retry) {
                // initialize config/options
                var o = options;
                // CANNOT init panes inside a hidden container!
                if (!$N.is(":visible")) {
                    // handle Chrome bug where popup window 'has no height'
                    // if layout is BODY element, try again in 50ms
                    // SEE: http://layout.jquery-dev.net/samples/test_popup_window.html
                    if ( !retry && browser.webkit && $N[0].tagName === "BODY" )
                        setTimeout(function(){ _initLayoutElements(true); }, 50);
                    return false;
                }

                // a center pane is required, so make sure it exists
                if (!getPane("center").length) {
                    return _log( o.errors.centerPaneMissing );
                }

                // TEMP status so isInitialized returns true during init process
                state.creatingLayout = true;

                // update Container dims
                $.extend(sC, elDims( $N, o.inset )); // passing inset means DO NOT include insetX values

                // initialize all layout elements
                initPanes();	// size & position panes - calls initHandles() - which calls initResizable()

                if (o.scrollToBookmarkOnLoad) {
                    var l = self.location;
                    if (l.hash) l.replace( l.hash ); // scrollTo Bookmark
                }

                // check to see if this layout 'nested' inside a pane
                if (Instance.hasParentLayout)
                    o.resizeWithWindow = false;
                // bind resizeAll() for 'this layout instance' to window.resize event
                else if (o.resizeWithWindow)
                    $(window).bind("resize."+ sID, windowResize);

                delete state.creatingLayout;
                state.initialized = true;

                // init plugins for this layout, if there are any
                runPluginCallbacks( Instance, $.layout.onReady );

                // now run the onload callback, if exists
                _runCallbacks("onload_end");

                return true; // elements initialized successfully
            }

        /**
         * Initialize nested layouts for a specific pane - can optionally pass layout-options
         *
         * @param {(string|Object)}	evt_or_pane	The pane being opened, ie: north, south, east, or west
         * @param {Object=}			[opts]		Layout-options - if passed, will OVERRRIDE options[pane].children
         * @return  An object pointer to the layout instance created - or null
         */
            ,	createChildren = function (evt_or_pane, opts) {
                var	pane = evtPane.call(this, evt_or_pane)
                    ,	$P	= $Ps[pane]
                    ;
                if (!$P) return;
                var	$C	= $Cs[pane]
                    ,	s	= state[pane]
                    ,	o	= options[pane]
                    ,	sm	= options.stateManagement || {}
                    ,	cos = opts ? (o.children = opts) : o.children
                    ;
                if ( $.isPlainObject( cos ) )
                    cos = [ cos ]; // convert a hash to a 1-elem array
                else if (!cos || !$.isArray( cos ))
                    return;

                $.each( cos, function (idx, co) {
                    if ( !$.isPlainObject( co ) ) return;

                    // determine which element is supposed to be the 'child container'
                    // if pane has a 'containerSelector' OR a 'content-div', use those instead of the pane
                    var $containers = co.containerSelector ? $P.find( co.containerSelector ) : ($C || $P);

                    $containers.each(function(){
                        var $cont	= $(this)
                            ,	child	= $cont.data("layout") //	see if a child-layout ALREADY exists on this element
                            ;
                        // if no layout exists, but children are set, try to create the layout now
                        if (!child) {
                            // TODO: see about moving this to the stateManagement plugin, as a method
                            // set a unique child-instance key for this layout, if not already set
                            setInstanceKey({ container: $cont, options: co }, s );
                            // If THIS layout has a hash in stateManagement.autoLoad,
                            // then see if it also contains status-data for this child-layout
                            // If so, copy the stateData to child.options.stateManagement.autoLoad
                            if ( sm.includeChildren && state.stateData[pane] ) {
                                //	THIS layout's status was cached when its status was loaded
                                var	paneChildren = state.stateData[pane].children || {}
                                    ,	childState	= paneChildren[ co.instanceKey ]
                                    ,	co_sm		= co.stateManagement || (co.stateManagement = { autoLoad: true })
                                    ;
                                // COPY the stateData into the autoLoad key
                                if ( co_sm.autoLoad === true && childState ) {
                                    co_sm.autoSave			= false; // disable autoSave because saving handled by parent-layout
                                    co_sm.includeChildren	= true;  // cascade option - FOR NOW
                                    co_sm.autoLoad = $.extend(true, {}, childState); // COPY the status-hash
                                }
                            }

                            // create the layout
                            child = $cont.layout( co );

                            // if successful, update data
                            if (child) {
                                // add the child and update all layout-pointers
                                // MAY have already been done by child-layout calling parent.refreshChildren()
                                refreshChildren( pane, child );
                            }
                        }
                    });
                });
            }

            ,	setInstanceKey = function (child, parentPaneState) {
                // create a named key for use in status and instance branches
                var	$c	= child.container
                    ,	o	= child.options
                    ,	sm	= o.stateManagement
                    ,	key	= o.instanceKey || $c.data("layoutInstanceKey")
                    ;
                if (!key) key = (sm && sm.cookie ? sm.cookie.name : '') || o.name; // look for a name/key
                if (!key) key = "layout"+ (++parentPaneState.childIdx);	// if no name/key found, generate one
                else key = key.replace(/[^\w-]/gi, '_').replace(/_{2,}/g, '_');	 // ensure is valid as a hash key
                o.instanceKey = key;
                $c.data("layoutInstanceKey", key); // useful if layout is destroyed and then recreated
                return key;
            }

        /**
         * @param {string}		pane		The pane being opened, ie: north, south, east, or west
         * @param {Object=}		newChild	New child-layout Instance to add to this pane
         */
            ,	refreshChildren = function (pane, newChild) {
                var	$P	= $Ps[pane]
                    ,	pC	= children[pane]
                    ,	s	= state[pane]
                    ,	o
                    ;
                // check for destroy()ed layouts and update the child pointers & arrays
                if ($.isPlainObject( pC )) {
                    $.each( pC, function (key, child) {
                        if (child.destroyed) delete pC[key]
                    });
                    // if no more children, remove the children hash
                    if ($.isEmptyObject( pC ))
                        pC = children[pane] = null; // clear children hash
                }

                // see if there is a directly-nested layout inside this pane
                // if there is, then there can be only ONE child-layout, so check that...
                if (!newChild && !pC) {
                    newChild = $P.data("layout");
                }

                // if a newChild instance was passed, add it to children[pane]
                if (newChild) {
                    // update child.status
                    newChild.hasParentLayout = true; // set parent-flag in child
                    // instanceKey is a key-name used in both status and children
                    o = newChild.options;
                    // set a unique child-instance key for this layout, if not already set
                    setInstanceKey( newChild, s );
                    // add pointer to pane.children hash
                    if (!pC) pC = children[pane] = {}; // create an empty children hash
                    pC[ o.instanceKey ] = newChild.container.data("layout"); // add childLayout instance
                }

                // ALWAYS refresh the pane.children alias, even if null
                Instance[pane].children = children[pane];

                // if newChild was NOT passed - see if there is a child layout NOW
                if (!newChild) {
                    createChildren(pane); // MAY create a child and re-call this method
                }
            }

            ,	windowResize = function () {
                var	o = options
                    ,	delay = Number(o.resizeWithWindowDelay);
                if (delay < 10) delay = 100; // MUST have a delay!
                // resizing uses a delay-loop because the resize event fires repeatly - except in FF, but delay anyway
                timer.clear("winResize"); // if already running
                timer.set("winResize", function(){
                    timer.clear("winResize");
                    timer.clear("winResizeRepeater");
                    var dims = elDims( $N, o.inset );
                    // only trigger resizeAll() if container has changed size
                    if (dims.innerWidth !== sC.innerWidth || dims.innerHeight !== sC.innerHeight)
                        resizeAll();
                }, delay);
                // ALSO set fixed-delay timer, if not already running
                if (!timer.data["winResizeRepeater"]) setWindowResizeRepeater();
            }

            ,	setWindowResizeRepeater = function () {
                var delay = Number(options.resizeWithWindowMaxDelay);
                if (delay > 0)
                    timer.set("winResizeRepeater", function(){ setWindowResizeRepeater(); resizeAll(); }, delay);
            }

            ,	unload = function () {
                var o = options;

                _runCallbacks("onunload_start");

                // trigger plugin callabacks for this layout (eg: stateManagement)
                runPluginCallbacks( Instance, $.layout.onUnload );

                _runCallbacks("onunload_end");
            }

        /**
         * Validate and initialize container CSS and events
         *
         * @see  _create()
         */
            ,	_initContainer = function () {
                var
                    N		= $N[0]
                    ,	$H		= $("html")
                    ,	tag		= sC.tagName = N.tagName
                    ,	id		= sC.id = N.id
                    ,	cls		= sC.className = N.className
                    ,	o		= options
                    ,	name	= o.name
                    ,	props	= "position,margin,padding,border"
                    ,	css		= "layoutCSS"
                    ,	CSS		= {}
                    ,	hid		= "hidden" // used A LOT!
                //	see if this container is a 'pane' inside an outer-layout
                    ,	parent	= $N.data("parentLayout")	// parent-layout Instance
                    ,	pane	= $N.data("layoutEdge")		// pane-name in parent-layout
                    ,	isChild	= parent && pane
                    ,	num		= $.layout.cssNum
                    ,	$parent, n
                    ;
                // sC = status.container
                sC.selector = $N.selector.split(".slice")[0];
                sC.ref		= (o.name ? o.name +' layout / ' : '') + tag + (id ? "#"+id : cls ? '.['+cls+']' : ''); // used in messages
                sC.isBody	= (tag === "BODY");

                // try to findAll a parent-layout
                if (!isChild && !sC.isBody) {
                    $parent = $N.closest("."+ $.layout.defaults.panes.paneClass);
                    parent	= $parent.data("parentLayout");
                    pane	= $parent.data("layoutEdge");
                    isChild	= parent && pane;
                }

                $N	.data({
                    layout: Instance
                    ,	layoutContainer: sID // FLAG to indicate this is a layout-container - contains unique internal ID
                })
                    .addClass(o.containerClass)
                ;
                var layoutMethods = {
                    destroy:	''
                    ,	initPanes:	''
                    ,	resizeAll:	'resizeAll'
                    ,	resize:		'resizeAll'
                };
                // loop hash and bind all methods - include layoutID namespacing
                for (name in layoutMethods) {
                    $N.bind("layout"+ name.toLowerCase() +"."+ sID, Instance[ layoutMethods[name] || name ]);
                }

                // if this container is another layout's 'pane', then set child/parent pointers
                if (isChild) {
                    // update parent flag
                    Instance.hasParentLayout = true;
                    // set pointers to THIS child-layout (Instance) in parent-layout
                    parent.refreshChildren( pane, Instance );
                }

                // SAVE original container CSS for use in destroy()
                if (!$N.data(css)) {
                    // handle props like overflow different for BODY & HTML - has 'system default' values
                    if (sC.isBody) {
                        // SAVE <BODY> CSS
                        $N.data(css, $.extend( styles($N, props), {
                            height:		$N.css("height")
                            ,	overflow:	$N.css("overflow")
                            ,	overflowX:	$N.css("overflowX")
                            ,	overflowY:	$N.css("overflowY")
                        }));
                        // ALSO SAVE <HTML> CSS
                        $H.data(css, $.extend( styles($H, 'padding'), {
                            height:		"auto" // FF would return a fixed px-size!
                            ,	overflow:	$H.css("overflow")
                            ,	overflowX:	$H.css("overflowX")
                            ,	overflowY:	$H.css("overflowY")
                        }));
                    }
                    else // handle props normally for non-body elements
                        $N.data(css, styles($N, props+",top,bottom,left,right,width,height,overflow,overflowX,overflowY") );
                }

                try {
                    // common container CSS
                    CSS = {
                        overflow:	hid
                        ,	overflowX:	hid
                        ,	overflowY:	hid
                    };
                    $N.css( CSS );

                    if (o.inset && !$.isPlainObject(o.inset)) {
                        // can specify a single number for equal outset all-around
                        n = parseInt(o.inset, 10) || 0
                        o.inset = {
                            top:	n
                            ,	bottom:	n
                            ,	left:	n
                            ,	right:	n
                        };
                    }

                    // format html & body if this is a full page layout
                    if (sC.isBody) {
                        // if HTML has padding, use this as an outer-spacing around BODY
                        if (!o.outset) {
                            // use padding from parent-elem (HTML) as outset
                            o.outset = {
                                top:	num($H, "paddingTop")
                                ,	bottom:	num($H, "paddingBottom")
                                ,	left:	num($H, "paddingLeft")
                                ,	right:	num($H, "paddingRight")
                            };
                        }
                        else if (!$.isPlainObject(o.outset)) {
                            // can specify a single number for equal outset all-around
                            n = parseInt(o.outset, 10) || 0
                            o.outset = {
                                top:	n
                                ,	bottom:	n
                                ,	left:	n
                                ,	right:	n
                            };
                        }
                        // HTML
                        $H.css( CSS ).css({
                            height:		"100%"
                            ,	border:		"none"	// no border or padding allowed when using height = 100%
                            ,	padding:	0		// ditto
                            ,	margin:		0
                        });
                        // BODY
                        if (browser.isIE6) {
                            // IE6 CANNOT use the trick of setting absolute positioning on all 4 sides - must have 'height'
                            $N.css({
                                width:		"100%"
                                ,	height:		"100%"
                                ,	border:		"none"	// no border or padding allowed when using height = 100%
                                ,	padding:	0		// ditto
                                ,	margin:		0
                                ,	position:	"relative"
                            });
                            // convert body padding to an inset option - the border cannot be measured in IE6!
                            if (!o.inset) o.inset = elDims( $N ).inset;
                        }
                        else { // use absolute positioning for BODY to allow borders & padding without overflow
                            $N.css({
                                width:		"auto"
                                ,	height:		"auto"
                                ,	margin:		0
                                ,	position:	"absolute"	// allows for border and padding on BODY
                            });
                            // apply edge-positioning created above
                            $N.css( o.outset );
                        }
                        // set current layout-container dimensions
                        $.extend(sC, elDims( $N, o.inset )); // passing inset means DO NOT include insetX values
                    }
                    else {
                        // container MUST have 'position'
                        var	p = $N.css("position");
                        if (!p || !p.match(/(fixed|absolute|relative)/))
                            $N.css("position","relative");

                        // set current layout-container dimensions
                        if ( $N.is(":visible") ) {
                            $.extend(sC, elDims( $N, o.inset )); // passing inset means DO NOT change insetX (padding) values
                            if (sC.innerHeight < 1) // container has no 'height' - warn developer
                                _log( o.errors.noContainerHeight.replace(/CONTAINER/, sC.ref) );
                        }
                    }

                    // if container has min-width/height, then enable scrollbar(s)
                    if ( num($N, "minWidth")  ) $N.parent().css("overflowX","auto");
                    if ( num($N, "minHeight") ) $N.parent().css("overflowY","auto");

                } catch (ex) {}
            }

        /**
         * Bind layout hotkeys - if options enabled
         *
         * @see  _create() and addPane()
         * @param {string=}	[panes=""]	The edge(s) to process
         */
            ,	initHotkeys = function (panes) {
                panes = panes ? panes.split(",") : _c.borderPanes;
                // bind keyDown to capture hotkeys, if option enabled for ANY pane
                $.each(panes, function (i, pane) {
                    var o = options[pane];
                    if (o.enableCursorHotkey || o.customHotkey) {
                        $(document).bind("keydown."+ sID, keyDown); // only need to bind this ONCE
                        return false; // BREAK - binding was done
                    }
                });
            }

        /**
         * Build final OPTIONS data
         *
         * @see  _create()
         */
            ,	initOptions = function () {
                var data, d, pane, key, val, i, c, o;

                // reprocess user's layout-options to have correct options sub-key structure
                opts = $.layout.transformData( opts, true ); // panes = default subkey

                // auto-rename old options for backward compatibility
                opts = $.layout.backwardCompatibility.renameAllOptions( opts );

                // if user-options has 'panes' key (pane-defaults), clean it...
                if (!$.isEmptyObject(opts.panes)) {
                    // REMOVE any pane-defaults that MUST be set per-pane
                    data = $.layout.optionsMap.noDefault;
                    for (i=0, c=data.length; i<c; i++) {
                        key = data[i];
                        delete opts.panes[key]; // OK if does not exist
                    }
                    // REMOVE any layout-options specified under opts.panes
                    data = $.layout.optionsMap.layout;
                    for (i=0, c=data.length; i<c; i++) {
                        key = data[i];
                        delete opts.panes[key]; // OK if does not exist
                    }
                }

                // MOVE any NON-layout-options from opts-root to opts.panes
                data = $.layout.optionsMap.layout;
                var rootKeys = $.layout.config.optionRootKeys;
                for (key in opts) {
                    val = opts[key];
                    if ($.inArray(key, rootKeys) < 0 && $.inArray(key, data) < 0) {
                        if (!opts.panes[key])
                            opts.panes[key] = $.isPlainObject(val) ? $.extend(true, {}, val) : val;
                        delete opts[key]
                    }
                }

                // START by updating ALL options from opts
                $.extend(true, options, opts);

                // CREATE final options (and config) for EACH pane
                $.each(_c.allPanes, function (i, pane) {

                    // apply 'pane-defaults' to CONFIG.[PANE]
                    _c[pane] = $.extend(true, {}, _c.panes, _c[pane]);

                    d = options.panes;
                    o = options[pane];

                    // center-pane uses SOME keys in defaults.panes branch
                    if (pane === 'center') {
                        // ONLY copy keys from opts.panes listed in: $.layout.optionsMap.center
                        data = $.layout.optionsMap.center;		// list of 'center-pane keys'
                        for (i=0, c=data.length; i<c; i++) {	// loop the list...
                            key = data[i];
                            // only need to use pane-default if pane-specific value not set
                            if (!opts.center[key] && (opts.panes[key] || !o[key]))
                                o[key] = d[key]; // pane-default
                        }
                    }
                    else {
                        // border-panes use ALL keys in defaults.panes branch
                        o = options[pane] = $.extend(true, {}, d, o); // re-apply pane-specific opts AFTER pane-defaults
                        createFxOptions( pane );
                        // ensure all border-pane-specific base-classes exist
                        if (!o.resizerClass)	o.resizerClass	= "ui-layout-resizer";
                        if (!o.togglerClass)	o.togglerClass	= "ui-layout-toggler";
                    }
                    // ensure we have base pane-class (ALL panes)
                    if (!o.paneClass) o.paneClass = "ui-layout-pane";
                });

                // update options.zIndexes if a zIndex-option specified
                var zo	= opts.zIndex
                    ,	z	= options.zIndexes;
                if (zo > 0) {
                    z.pane_normal		= zo;
                    z.content_mask		= max(zo+1, z.content_mask);	// MIN = +1
                    z.resizer_normal	= max(zo+2, z.resizer_normal);	// MIN = +2
                }

                // DELETE 'panes' key now that we are done - values were copied to EACH pane
                delete options.panes;


                function createFxOptions ( pane ) {
                    var	o = options[pane]
                        ,	d = options.panes;
                    // ensure fxSettings key to avoid errors
                    if (!o.fxSettings) o.fxSettings = {};
                    if (!d.fxSettings) d.fxSettings = {};

                    $.each(["_open","_close","_size"], function (i,n) {
                        var
                            sName		= "fxName"+ n
                            ,	sSpeed		= "fxSpeed"+ n
                            ,	sSettings	= "fxSettings"+ n
                        // recalculate fxName according to specificity rules
                            ,	fxName = o[sName] =
                                o[sName]	// options.west.fxName_open
                                    ||	d[sName]	// options.panes.fxName_open
                                    ||	o.fxName	// options.west.fxName
                                    ||	d.fxName	// options.panes.fxName
                                    ||	"none"		// MEANS $.layout.defaults.panes.fxName == "" || false || null || 0
                            ,	fxExists	= $.effects && ($.effects[fxName] || ($.effects.effect && $.effects.effect[fxName]))
                            ;
                        // validate fxName to ensure is valid effect - MUST have effect-config data in options.effects
                        if (fxName === "none" || !options.effects[fxName] || !fxExists)
                            fxName = o[sName] = "none"; // effect not loaded OR unrecognized fxName

                        // set vars for effects subkeys to simplify logic
                        var	fx		= options.effects[fxName] || {}	// effects.slide
                            ,	fx_all	= fx.all	|| null				// effects.slide.all
                            ,	fx_pane	= fx[pane]	|| null				// effects.slide.west
                            ;
                        // create fxSpeed[_open|_close|_size]
                        o[sSpeed] =
                            o[sSpeed]				// options.west.fxSpeed_open
                                ||	d[sSpeed]				// options.west.fxSpeed_open
                                ||	o.fxSpeed				// options.west.fxSpeed
                                ||	d.fxSpeed				// options.panes.fxSpeed
                                ||	null					// DEFAULT - let fxSetting.duration control speed
                        ;
                        // create fxSettings[_open|_close|_size]
                        o[sSettings] = $.extend(
                            true
                            ,	{}
                            ,	fx_all					// effects.slide.all
                            ,	fx_pane					// effects.slide.west
                            ,	d.fxSettings			// options.panes.fxSettings
                            ,	o.fxSettings			// options.west.fxSettings
                            ,	d[sSettings]			// options.panes.fxSettings_open
                            ,	o[sSettings]			// options.west.fxSettings_open
                        );
                    });

                    // DONE creating action-specific-settings for this pane,
                    // so DELETE generic options - are no longer meaningful
                    delete o.fxName;
                    delete o.fxSpeed;
                    delete o.fxSettings;
                }
            }

        /**
         * Initialize module objects, styling, size and position for all panes
         *
         * @see  _initElements()
         * @param {string}	pane		The pane to process
         */
            ,	getPane = function (pane) {
                var sel = options[pane].paneSelector
                if (sel.substr(0,1)==="#") // ID selector
                // NOTE: elements selected 'by ID' DO NOT have to be 'children'
                    return $N.find(sel).eq(0);
                else { // class or other selector
                    var $P = $N.children(sel).eq(0);
                    // look for the pane nested inside a 'form' element
                    return $P.length ? $P : $N.children("form:first").children(sel).eq(0);
                }
            }

        /**
         * @param {Object=}		evt
         */
            ,	initPanes = function (evt) {
                // stopPropagation if called by trigger("layoutinitpanes") - use evtPane utility
                evtPane(evt);

                // NOTE: do north & south FIRST so we can measure their height - do center LAST
                $.each(_c.allPanes, function (idx, pane) {
                    addPane( pane, true );
                });

                // init the pane-handles NOW in case we have to hide or close the pane below
                initHandles();

                // now that all panes have been initialized and initially-sized,
                // make sure there is really enough space available for each pane
                $.each(_c.borderPanes, function (i, pane) {
                    if ($Ps[pane] && state[pane].isVisible) { // pane is OPEN
                        setSizeLimits(pane);
                        makePaneFit(pane); // pane may be Closed, Hidden or Resized by makePaneFit()
                    }
                });
                // size center-pane AGAIN in case we 'closed' a border-pane in loop above
                sizeMidPanes("center");

                //	Chrome/Webkit sometimes fires callbacks BEFORE it completes resizing!
                //	Before RC30.3, there was a 10ms delay here, but that caused layout
                //	to load asynchrously, which is BAD, so try skipping delay for now

                // process pane contents and callbacks, and init/resize child-layout if exists
                $.each(_c.allPanes, function (idx, pane) {
                    afterInitPane(pane);
                });
            }

        /**
         * Add a pane to the layout - subroutine of initPanes()
         *
         * @see  initPanes()
         * @param {string}	pane			The pane to process
         * @param {boolean=}	[force=false]	Size content after init
         */
            ,	addPane = function (pane, force) {
                if (!force && !isInitialized()) return;
                var
                    o		= options[pane]
                    ,	s		= state[pane]
                    ,	c		= _c[pane]
                    ,	dir		= c.dir
                    ,	fx		= s.fx
                    ,	spacing	= o.spacing_open || 0
                    ,	isCenter = (pane === "center")
                    ,	CSS		= {}
                    ,	$P		= $Ps[pane]
                    ,	size, minSize, maxSize, child
                    ;
                // if pane-pointer already exists, remove the old one first
                if ($P)
                    removePane( pane, false, true, false );
                else
                    $Cs[pane] = false; // init

                $P = $Ps[pane] = getPane(pane);
                if (!$P.length) {
                    $Ps[pane] = false; // logic
                    return;
                }

                // SAVE original Pane CSS
                if (!$P.data("layoutCSS")) {
                    var props = "position,top,left,bottom,right,width,height,overflow,zIndex,display,backgroundColor,padding,margin,border";
                    $P.data("layoutCSS", styles($P, props));
                }

                // create alias for pane data in Instance - initHandles will add more
                Instance[pane] = {
                    name:		pane
                    ,	pane:		$Ps[pane]
                    ,	content:	$Cs[pane]
                    ,	options:	options[pane]
                    ,	state:		state[pane]
                    ,	children:	children[pane]
                };

                // add classes, attributes & events
                $P	.data({
                    parentLayout:	Instance		// pointer to Layout Instance
                    ,	layoutPane:		Instance[pane]	// NEW pointer to pane-alias-object
                    ,	layoutEdge:		pane
                    ,	layoutRole:		"pane"
                })
                    .css(c.cssReq).css("zIndex", options.zIndexes.pane_normal)
                    .css(o.applyDemoStyles ? c.cssDemo : {}) // demo styles
                    .addClass( o.paneClass +" "+ o.paneClass+"-"+pane ) // default = "ui-layout-pane ui-layout-pane-west" - may be a dupe of 'paneSelector'
                    .bind("mouseenter."+ sID, addHover )
                    .bind("mouseleave."+ sID, removeHover )
                ;
                var paneMethods = {
                        hide:				''
                        ,	show:				''
                        ,	toggle:				''
                        ,	close:				''
                        ,	open:				''
                        ,	slideOpen:			''
                        ,	slideClose:			''
                        ,	slideToggle:		''
                        ,	size:				'sizePane'
                        ,	sizePane:			'sizePane'
                        ,	sizeContent:		''
                        ,	sizeHandles:		''
                        ,	enableClosable:		''
                        ,	disableClosable:	''
                        ,	enableSlideable:	''
                        ,	disableSlideable:	''
                        ,	enableResizable:	''
                        ,	disableResizable:	''
                        ,	swapPanes:			'swapPanes'
                        ,	swap:				'swapPanes'
                        ,	move:				'swapPanes'
                        ,	removePane:			'removePane'
                        ,	remove:				'removePane'
                        ,	createChildren:		''
                        ,	resizeChildren:		''
                        ,	resizeAll:			'resizeAll'
                        ,	resizeLayout:		'resizeAll'
                    }
                    ,	name;
                // loop hash and bind all methods - include layoutID namespacing
                for (name in paneMethods) {
                    $P.bind("layoutpane"+ name.toLowerCase() +"."+ sID, Instance[ paneMethods[name] || name ]);
                }

                // see if this pane has a 'scrolling-content element'
                initContent(pane, false); // false = do NOT sizeContent() - called later

                if (!isCenter) {
                    // call _parseSize AFTER applying pane classes & styles - but before making visible (if hidden)
                    // if o.size is auto or not valid, then MEASURE the pane and use that as its 'size'
                    size	= s.size = _parseSize(pane, o.size);
                    minSize	= _parseSize(pane,o.minSize) || 1;
                    maxSize	= _parseSize(pane,o.maxSize) || 100000;
                    if (size > 0) size = max(min(size, maxSize), minSize);
                    s.autoResize = o.autoResize; // used with percentage sizes

                    // status for border-panes
                    s.isClosed  = false; // true = pane is closed
                    s.isSliding = false; // true = pane is currently open by 'sliding' over adjacent panes
                    s.isResizing= false; // true = pane is in process of being resized
                    s.isHidden	= false; // true = pane is hidden - no spacing, resizer or toggler is visible!

                    // array for 'pin buttons' whose classNames are auto-updated on pane-open/-close
                    if (!s.pins) s.pins = [];
                }
                //	states common to ALL panes
                s.tagName	= $P[0].tagName;
                s.edge		= pane;		// useful if pane is (or about to be) 'swapped' - easy findAll out where it is (or is going)
                s.noRoom	= false;	// true = pane 'automatically' hidden due to insufficient room - will unhide automatically
                s.isVisible	= true;		// false = pane is invisible - closed OR hidden - simplify logic

                // init pane positioning
                setPanePosition( pane );

                // if pane is not visible,
                if (dir === "horz") // north or south pane
                    CSS.height = cssH($P, size);
                else if (dir === "vert") // east or west pane
                    CSS.width = cssW($P, size);
                //else if (isCenter) {}

                $P.css(CSS); // apply size -- top, bottom & height will be set by sizeMidPanes
                if (dir != "horz") sizeMidPanes(pane, true); // true = skipCallback

                // if manually adding a pane AFTER layout initialization, then...
                if (state.initialized) {
                    initHandles( pane );
                    initHotkeys( pane );
                }

                // close or hide the pane if specified in settings
                if (o.initClosed && o.closable && !o.initHidden)
                    close(pane, true, true); // true, true = force, noAnimation
                else if (o.initHidden || o.initClosed)
                    hide(pane); // will be completely invisible - no resizer or spacing
                else if (!s.noRoom)
                // make the pane visible - in case was initially hidden
                    $P.css("display","block");
                // ELSE setAsOpen() - called later by initHandles()

                // RESET visibility now - pane will appear IF display:block
                $P.css("visibility","visible");

                // check option for auto-handling of pop-ups & drop-downs
                if (o.showOverflowOnHover)
                    $P.hover( allowOverflow, resetOverflow );

                // if manually adding a pane AFTER layout initialization, then...
                if (state.initialized) {
                    afterInitPane( pane );
                }
            }

            ,	afterInitPane = function (pane) {
                var	$P	= $Ps[pane]
                    ,	s	= state[pane]
                    ,	o	= options[pane]
                    ;
                if (!$P) return;

                // see if there is a directly-nested layout inside this pane
                if ($P.data("layout"))
                    refreshChildren( pane, $P.data("layout") );

                // process pane contents and callbacks, and init/resize child-layout if exists
                if (s.isVisible) { // pane is OPEN
                    if (state.initialized) // this pane was added AFTER layout was created
                        resizeAll(); // will also sizeContent
                    else
                        sizeContent(pane);

                    if (o.triggerEventsOnLoad)
                        _runCallbacks("onresize_end", pane);
                    else // automatic if onresize called, otherwise call it specifically
                    // resize child - IF inner-layout already exists (created before this layout)
                        resizeChildren(pane, true); // a previously existing childLayout
                }

                // init childLayouts - even if pane is not visible
                if (o.initChildren && o.children)
                    createChildren(pane);
            }

        /**
         * @param {string=}	panes		The pane(s) to process
         */
            ,	setPanePosition = function (panes) {
                panes = panes ? panes.split(",") : _c.borderPanes;

                // create toggler DIVs for each pane, and set object pointers for them, eg: $R.north = north toggler DIV
                $.each(panes, function (i, pane) {
                    var $P	= $Ps[pane]
                        ,	$R	= $Rs[pane]
                        ,	o	= options[pane]
                        ,	s	= state[pane]
                        ,	side =  _c[pane].side
                        ,	CSS	= {}
                        ;
                    if (!$P) return; // pane does not exist - skip

                    // set css-position to account for container borders & padding
                    switch (pane) {
                        case "north": 	CSS.top 	= sC.inset.top;
                            CSS.left 	= sC.inset.left;
                            CSS.right	= sC.inset.right;
                            break;
                        case "south": 	CSS.bottom	= sC.inset.bottom;
                            CSS.left 	= sC.inset.left;
                            CSS.right 	= sC.inset.right;
                            break;
                        case "west": 	CSS.left 	= sC.inset.left; // top, bottom & height set by sizeMidPanes()
                            break;
                        case "east": 	CSS.right 	= sC.inset.right; // ditto
                            break;
                        case "center":	// top, left, width & height set by sizeMidPanes()
                    }
                    // apply position
                    $P.css(CSS);

                    // update resizer position
                    if ($R && s.isClosed)
                        $R.css(side, sC.inset[side]);
                    else if ($R && !s.isHidden)
                        $R.css(side, sC.inset[side] + getPaneSize(pane));
                });
            }

        /**
         * Initialize module objects, styling, size and position for all resize bars and toggler buttons
         *
         * @see  _create()
         * @param {string=}	[panes=""]	The edge(s) to process
         */
            ,	initHandles = function (panes) {
                panes = panes ? panes.split(",") : _c.borderPanes;

                // create toggler DIVs for each pane, and set object pointers for them, eg: $R.north = north toggler DIV
                $.each(panes, function (i, pane) {
                    var $P		= $Ps[pane];
                    $Rs[pane]	= false; // INIT
                    $Ts[pane]	= false;
                    if (!$P) return; // pane does not exist - skip

                    var	o		= options[pane]
                        ,	s		= state[pane]
                        ,	c		= _c[pane]
                        ,	paneId	= o.paneSelector.substr(0,1) === "#" ? o.paneSelector.substr(1) : ""
                        ,	rClass	= o.resizerClass
                        ,	tClass	= o.togglerClass
                        ,	spacing	= (s.isVisible ? o.spacing_open : o.spacing_closed)
                        ,	_pane	= "-"+ pane // used for classNames
                        ,	_state	= (s.isVisible ? "-open" : "-closed") // used for classNames
                        ,	I		= Instance[pane]
                    // INIT RESIZER BAR
                        ,	$R		= I.resizer = $Rs[pane] = $("<div></div>")
                    // INIT TOGGLER BUTTON
                        ,	$T		= I.toggler = (o.closable ? $Ts[pane] = $("<div></div>") : false)
                        ;

                    //if (s.isVisible && o.resizable) ... handled by initResizable
                    if (!s.isVisible && o.slidable)
                        $R.attr("title", o.tips.Slide).css("cursor", o.sliderCursor);

                    $R	// if paneSelector is an ID, then create a matching ID for the resizer, eg: "#paneLeft" => "paneLeft-resizer"
                        .attr("id", paneId ? paneId +"-resizer" : "" )
                        .data({
                            parentLayout:	Instance
                            ,	layoutPane:		Instance[pane]	// NEW pointer to pane-alias-object
                            ,	layoutEdge:		pane
                            ,	layoutRole:		"resizer"
                        })
                        .css(_c.resizers.cssReq).css("zIndex", options.zIndexes.resizer_normal)
                        .css(o.applyDemoStyles ? _c.resizers.cssDemo : {}) // add demo styles
                        .addClass(rClass +" "+ rClass+_pane)
                        .hover(addHover, removeHover) // ALWAYS add hover-classes, even if resizing is not enabled - handle with CSS instead
                        .hover(onResizerEnter, onResizerLeave) // ALWAYS NEED resizer.mouseleave to balance toggler.mouseenter
                        .appendTo($N) // append DIV to container
                    ;
                    if (o.resizerDblClickToggle)
                        $R.bind("dblclick."+ sID, toggle );

                    if ($T) {
                        $T	// if paneSelector is an ID, then create a matching ID for the resizer, eg: "#paneLeft" => "#paneLeft-toggler"
                            .attr("id", paneId ? paneId +"-toggler" : "" )
                            .data({
                                parentLayout:	Instance
                                ,	layoutPane:		Instance[pane]	// NEW pointer to pane-alias-object
                                ,	layoutEdge:		pane
                                ,	layoutRole:		"toggler"
                            })
                            .css(_c.togglers.cssReq) // add base/required styles
                            .css(o.applyDemoStyles ? _c.togglers.cssDemo : {}) // add demo styles
                            .addClass(tClass +" "+ tClass+_pane)
                            .hover(addHover, removeHover) // ALWAYS add hover-classes, even if toggling is not enabled - handle with CSS instead
                            .bind("mouseenter", onResizerEnter) // NEED toggler.mouseenter because mouseenter MAY NOT fire on resizer
                            .appendTo($R) // append SPAN to resizer DIV
                        ;
                        // ADD INNER-SPANS TO TOGGLER
                        if (o.togglerContent_open) // ui-layout-open
                            $("<span>"+ o.togglerContent_open +"</span>")
                                .data({
                                    layoutEdge:		pane
                                    ,	layoutRole:		"togglerContent"
                                })
                                .data("layoutRole", "togglerContent")
                                .data("layoutEdge", pane)
                                .addClass("content content-open")
                                .css("display","none")
                                .appendTo( $T )
                                //.hover( addHover, removeHover ) // use ui-layout-toggler-west-hover .content-open instead!
                            ;
                        if (o.togglerContent_closed) // ui-layout-closed
                            $("<span>"+ o.togglerContent_closed +"</span>")
                                .data({
                                    layoutEdge:		pane
                                    ,	layoutRole:		"togglerContent"
                                })
                                .addClass("content content-closed")
                                .css("display","none")
                                .appendTo( $T )
                                //.hover( addHover, removeHover ) // use ui-layout-toggler-west-hover .content-closed instead!
                            ;
                        // ADD TOGGLER.click/.hover
                        enableClosable(pane);
                    }

                    // add Draggable events
                    initResizable(pane);

                    // ADD CLASSNAMES & SLIDE-BINDINGS - eg: class="resizer resizer-west resizer-open"
                    if (s.isVisible)
                        setAsOpen(pane);	// onOpen will be called, but NOT onResize
                    else {
                        setAsClosed(pane);	// onClose will be called
                        bindStartSlidingEvents(pane, true); // will enable events IF option is set
                    }

                });

                // SET ALL HANDLE DIMENSIONS
                sizeHandles();
            }


        /**
         * Initialize scrolling ui-layout-content div - if exists
         *
         * @see  initPane() - or externally after an Ajax injection
         * @param {string}	pane			The pane to process
         * @param {boolean=}	[resize=true]	Size content after init
         */
            ,	initContent = function (pane, resize) {
                if (!isInitialized()) return;
                var
                    o	= options[pane]
                    ,	sel	= o.contentSelector
                    ,	I	= Instance[pane]
                    ,	$P	= $Ps[pane]
                    ,	$C
                    ;
                if (sel) $C = I.content = $Cs[pane] = (o.findNestedContent)
                    ? $P.find(sel).eq(0) // match 1-element only
                    : $P.children(sel).eq(0)
                ;
                if ($C && $C.length) {
                    $C.data("layoutRole", "content");
                    // SAVE original Content CSS
                    if (!$C.data("layoutCSS"))
                        $C.data("layoutCSS", styles($C, "height"));
                    $C.css( _c.content.cssReq );
                    if (o.applyDemoStyles) {
                        $C.css( _c.content.cssDemo ); // add padding & overflow: auto to content-div
                        $P.css( _c.content.cssDemoPane ); // REMOVE padding/scrolling from pane
                    }
                    // ensure no vertical scrollbar on pane - will mess up measurements
                    if ($P.css("overflowX").match(/(scroll|auto)/)) {
                        $P.css("overflow", "hidden");
                    }
                    state[pane].content = {}; // init content status
                    if (resize !== false) sizeContent(pane);
                    // sizeContent() is called AFTER init of all elements
                }
                else
                    I.content = $Cs[pane] = false;
            }


        /**
         * Add resize-bars to all panes that specify it in options
         * -dependancy: $.fn.resizable - will skip if not found
         *
         * @see  _create()
         * @param {string=}	[panes=""]	The edge(s) to process
         */
            ,	initResizable = function (panes) {
                var	draggingAvailable = $.layout.plugins.draggable
                    ,	side // set in start()
                    ;
                panes = panes ? panes.split(",") : _c.borderPanes;

                $.each(panes, function (idx, pane) {
                    var o = options[pane];
                    if (!draggingAvailable || !$Ps[pane] || !o.resizable) {
                        o.resizable = false;
                        return true; // skip to next
                    }

                    var s		= state[pane]
                        ,	z		= options.zIndexes
                        ,	c		= _c[pane]
                        ,	side	= c.dir=="horz" ? "top" : "left"
                        ,	$P 		= $Ps[pane]
                        ,	$R		= $Rs[pane]
                        ,	base	= o.resizerClass
                        ,	lastPos	= 0 // used when live-resizing
                        ,	r, live // set in start because may change
                    //	'drag' classes are applied to the ORIGINAL resizer-bar while dragging is in process
                        ,	resizerClass		= base+"-drag"				// resizer-drag
                        ,	resizerPaneClass	= base+"-"+pane+"-drag"		// resizer-north-drag
                    //	'helper' class is applied to the CLONED resizer-bar while it is being dragged
                        ,	helperClass			= base+"-dragging"			// resizer-dragging
                        ,	helperPaneClass		= base+"-"+pane+"-dragging" // resizer-north-dragging
                        ,	helperLimitClass	= base+"-dragging-limit"	// resizer-drag
                        ,	helperPaneLimitClass = base+"-"+pane+"-dragging-limit"	// resizer-north-drag
                        ,	helperClassesSet	= false 					// logic var
                        ;

                    if (!s.isClosed)
                        $R.attr("title", o.tips.Resize)
                            .css("cursor", o.resizerCursor); // n-resize, s-resize, etc

                    $R.draggable({
                        containment:	$N[0] // limit resizing to layout container
                        ,	axis:			(c.dir=="horz" ? "y" : "x") // limit resizing to horz or vert axis
                        ,	delay:			0
                        ,	distance:		1
                        ,	grid:			o.resizingGrid
                        //	basic format for helper - style it using class: .ui-draggable-dragging
                        ,	helper:			"clone"
                        ,	opacity:		o.resizerDragOpacity
                        ,	addClasses:		false // avoid ui-status-disabled class when disabled
                        ,	iframeFix:		o.draggableIframeFix // TODO: consider using when bug is fixed
                        ,	zIndex:			z.resizer_drag

                        ,	start: function (e, ui) {
                            // REFRESH options & status pointers in case we used swapPanes
                            o = options[pane];
                            s = state[pane];
                            // re-read options
                            live = o.livePaneResizing;

                            // ondrag_start callback - will CANCEL hide if returns false
                            // TODO: dragging CANNOT be cancelled like this, so see if there is a way?
                            if (false === _runCallbacks("ondrag_start", pane)) return false;

                            s.isResizing		= true; // prevent pane from closing while resizing
                            state.paneResizing	= pane; // easy to see if ANY pane is resizing
                            timer.clear(pane+"_closeSlider"); // just in case already triggered

                            // SET RESIZER LIMITS - used in drag()
                            setSizeLimits(pane); // update pane/resizer status
                            r = s.resizerPosition;
                            lastPos = ui.position[ side ]

                            $R.addClass( resizerClass +" "+ resizerPaneClass ); // add drag classes
                            helperClassesSet = false; // reset logic var - see drag()

                            // DISABLE TEXT SELECTION (probably already done by resizer.mouseOver)
                            $('body').disableSelection();

                            // MASK PANES CONTAINING IFRAMES, APPLETS OR OTHER TROUBLESOME ELEMENTS
                            showMasks( pane, { resizing: true });
                        }

                        ,	drag: function (e, ui) {
                            if (!helperClassesSet) { // can only add classes after clone has been added to the DOM
                                //$(".ui-draggable-dragging")
                                ui.helper
                                    .addClass( helperClass +" "+ helperPaneClass ) // add helper classes
                                    .css({ right: "auto", bottom: "auto" })	// fix dir="rtl" issue
                                    .children().css("visibility","hidden")	// hide toggler inside dragged resizer-bar
                                ;
                                helperClassesSet = true;
                                // draggable bug!? RE-SET zIndex to prevent E/W resize-bar showing through N/S pane!
                                if (s.isSliding) $Ps[pane].css("zIndex", z.pane_sliding);
                            }
                            // CONTAIN RESIZER-BAR TO RESIZING LIMITS
                            var limit = 0;
                            if (ui.position[side] < r.min) {
                                ui.position[side] = r.min;
                                limit = -1;
                            }
                            else if (ui.position[side] > r.max) {
                                ui.position[side] = r.max;
                                limit = 1;
                            }
                            // ADD/REMOVE dragging-limit CLASS
                            if (limit) {
                                ui.helper.addClass( helperLimitClass +" "+ helperPaneLimitClass ); // at dragging-limit
                                window.defaultStatus = (limit>0 && pane.match(/(north|west)/)) || (limit<0 && pane.match(/(south|east)/)) ? o.tips.maxSizeWarning : o.tips.minSizeWarning;
                            }
                            else {
                                ui.helper.removeClass( helperLimitClass +" "+ helperPaneLimitClass ); // not at dragging-limit
                                window.defaultStatus = "";
                            }
                            // DYNAMICALLY RESIZE PANES IF OPTION ENABLED
                            // won't trigger unless resizer has actually moved!
                            if (live && Math.abs(ui.position[side] - lastPos) >= o.liveResizingTolerance) {
                                lastPos = ui.position[side];
                                resizePanes(e, ui, pane)
                            }
                        }

                        ,	stop: function (e, ui) {
                            $('body').enableSelection(); // RE-ENABLE TEXT SELECTION
                            window.defaultStatus = ""; // clear 'resizing limit' message from statusbar
                            $R.removeClass( resizerClass +" "+ resizerPaneClass ); // remove drag classes from Resizer
                            s.isResizing		= false;
                            state.paneResizing	= false; // easy to see if ANY pane is resizing
                            resizePanes(e, ui, pane, true); // true = resizingDone
                        }

                    });
                });

                /**
                 * resizePanes
                 *
                 * Sub-routine called from stop() - and drag() if livePaneResizing
                 *
                 * @param {!Object}		evt
                 * @param {!Object}		ui
                 * @param {string}		pane
                 * @param {boolean=}		[resizingDone=false]
                 */
                var resizePanes = function (evt, ui, pane, resizingDone) {
                    var	dragPos	= ui.position
                        ,	c		= _c[pane]
                        ,	o		= options[pane]
                        ,	s		= state[pane]
                        ,	resizerPos
                        ;
                    switch (pane) {
                        case "north":	resizerPos = dragPos.top; break;
                        case "west":	resizerPos = dragPos.left; break;
                        case "south":	resizerPos = sC.layoutHeight - dragPos.top  - o.spacing_open; break;
                        case "east":	resizerPos = sC.layoutWidth  - dragPos.left - o.spacing_open; break;
                    };
                    // remove container margin from resizer position to get the pane size
                    var newSize = resizerPos - sC.inset[c.side];

                    // Disable OR Resize Mask(s) created in drag.start
                    if (!resizingDone) {
                        // ensure we meet liveResizingTolerance criteria
                        if (Math.abs(newSize - s.size) < o.liveResizingTolerance)
                            return; // SKIP resize this time
                        // resize the pane
                        manualSizePane(pane, newSize, false, true); // true = noAnimation
                        sizeMasks(); // resize all visible masks
                    }
                    else { // resizingDone
                        // ondrag_end callback
                        if (false !== _runCallbacks("ondrag_end", pane))
                            manualSizePane(pane, newSize, false, true); // true = noAnimation
                        hideMasks(true); // true = force hiding all masks even if one is 'sliding'
                        if (s.isSliding) // RE-SHOW 'object-masks' so objects won't show through sliding pane
                            showMasks( pane, { resizing: true });
                    }
                };
            }

        /**
         *	sizeMask
         *
         *	Needed to overlay a DIV over an IFRAME-pane because mask CANNOT be *inside* the pane
         *	Called when mask created, and during livePaneResizing
         */
            ,	sizeMask = function () {
                var $M		= $(this)
                    ,	pane	= $M.data("layoutMask") // eg: "west"
                    ,	s		= state[pane]
                    ;
                // only masks over an IFRAME-pane need manual resizing
                if (s.tagName == "IFRAME" && s.isVisible) // no need to mask closed/hidden panes

                //zhangkaitao top s.css.top
                    $M.css({
                        top:	s.css.top
                        ,	left:	s.css.left
                        ,	width:	s.outerWidth
                        ,	height:	s.outerHeight
                    });
                /* ALT Method...
                 var $P = $Ps[pane];
                 $M.css( $P.position() ).css({ width: $P[0].offsetWidth, height: $P[0].offsetHeight });
                 */
            }
            ,	sizeMasks = function () {
                $Ms.each( sizeMask ); // resize all 'visible' masks
            }

        /**
         * @param {string}	pane		The pane being resized, animated or isSliding
         * @param {Object=}	[args]		(optional) Options: which masks to apply, and to which panes
         */
            ,	showMasks = function (pane, args) {
                var	c		= _c[pane]
                    ,	panes	=  ["center"]
                    ,	z		= options.zIndexes
                    ,	a		= $.extend({
                        objectsOnly:	false
                        ,	animation:		false
                        ,	resizing:		true
                        ,	sliding:		state[pane].isSliding
                    },	args )
                    ,	o, s
                    ;
                if (a.resizing)
                    panes.push( pane );
                if (a.sliding)
                    panes.push( _c.oppositeEdge[pane] ); // ADD the oppositeEdge-pane

                if (c.dir === "horz") {
                    panes.push("west");
                    panes.push("east");
                }

                $.each(panes, function(i,p){
                    s = state[p];
                    o = options[p];
                    if (s.isVisible && ( o.maskObjects || (!a.objectsOnly && o.maskContents) )) {
                        getMasks(p).each(function(){
                            sizeMask.call(this);
                            this.style.zIndex = s.isSliding ? z.pane_sliding+1 : z.pane_normal+1
                            this.style.display = "block";
                        });
                    }
                });
            }

        /**
         * @param {boolean=}	force		Hide masks even if a pane is sliding
         */
            ,	hideMasks = function (force) {
                // ensure no pane is resizing - could be a timing issue
                if (force || !state.paneResizing) {
                    $Ms.hide(); // hide ALL masks
                }
                // if ANY pane is sliding, then DO NOT remove masks from panes with maskObjects enabled
                else if (!force && !$.isEmptyObject( state.panesSliding )) {
                    var	i = $Ms.length - 1
                        ,	p, $M;
                    for (; i >= 0; i--) {
                        $M	= $Ms.eq(i);
                        p	= $M.data("layoutMask");
                        if (!options[p].maskObjects) {
                            $M.hide();
                        }
                    }
                }
            }

        /**
         * @param {string}	pane
         */
            ,	getMasks = function (pane) {
                var $Masks	= $([])
                    ,	$M, i = 0, c = $Ms.length
                    ;
                for (; i<c; i++) {
                    $M = $Ms.eq(i);
                    if ($M.data("layoutMask") === pane)
                        $Masks = $Masks.add( $M );
                }
                if ($Masks.length)
                    return $Masks;
                else
                    return createMasks(pane);
            }

        /**
         * createMasks
         *
         * Generates both DIV (ALWAYS used) and IFRAME (optional) elements as masks
         * An IFRAME mask is created *under* the DIV when maskObjects=true, because a DIV cannot mask an applet
         *
         * @param {string}	pane
         */
            ,	createMasks = function (pane) {
                var
                    $P		= $Ps[pane]
                    ,	s		= state[pane]
                    ,	o		= options[pane]
                    ,	z		= options.zIndexes
                //,	objMask	= o.maskObjects && s.tagName != "IFRAME" // check for option
                    ,	$Masks	= $([])
                    ,	isIframe, el, $M, css, i
                    ;
                if (!o.maskContents && !o.maskObjects) return $Masks;
                // if o.maskObjects=true, then loop TWICE to create BOTH kinds of mask, else only create a DIV
                for (i=0; i < (o.maskObjects ? 2 : 1); i++) {
                    isIframe = o.maskObjects && i==0;
                    el = document.createElement( isIframe ? "iframe" : "div" );
                    $M = $(el).data("layoutMask", pane); // add data to relate mask to pane
                    el.className = "ui-layout-mask ui-layout-mask-"+ pane; // for user styling
                    css = el.style;
                    // styles common to both DIVs and IFRAMES
                    css.display		= "block";
                    css.position	= "absolute";
                    css.background	= "#FFF";
                    if (isIframe) { // IFRAME-only props
                        el.frameborder = 0;
                        el.src		= "about:blank";
                        //el.allowTransparency = true; - for IE, but breaks masking ability!
                        css.opacity	= 0;
                        css.filter	= "Alpha(Opacity='0')";
                        css.border	= 0;
                    }
                    // if pane is an IFRAME, then must mask the pane itself
                    if (s.tagName == "IFRAME") {
                        // NOTE sizing done by a subroutine so can be called during live-resizing
                        css.zIndex	= z.pane_normal+1; // 1-higher than pane
                        $N.append( el ); // append to LAYOUT CONTAINER
                    }
                    // otherwise put masks *inside the pane* to mask its contents
                    else {
                        $M.addClass("ui-layout-mask-inside-pane");
                        css.zIndex	= o.maskZindex || z.content_mask; // usually 1, but customizable
                        css.top		= 0;
                        css.left	= 0;
                        css.width	= "100%";
                        css.height	= "100%";
                        $P.append( el ); // append INSIDE pane element
                    }
                    // add to return object
                    $Masks = $Masks.add( el );
                    // add Mask to cached array so can be resized & reused
                    $Ms = $Ms.add( el );
                }
                return $Masks;
            }


        /**
         * Destroy this layout and reset all elements
         *
         * @param {boolean=}	[destroyChildren=false]		Destory Child-Layouts first?
         */
            ,	destroy = function (evt_or_destroyChildren, destroyChildren) {
                // UNBIND layout events and remove global object
                $(window).unbind("."+ sID);		// resize & unload
                $(document).unbind("."+ sID);	// keyDown (hotkeys)

                if (typeof evt_or_destroyChildren === "object")
                // stopPropagation if called by trigger("layoutdestroy") - use evtPane utility
                    evtPane(evt_or_destroyChildren);
                else // no event, so transfer 1st param to destroyChildren param
                    destroyChildren = evt_or_destroyChildren;

                // need to look for parent layout BEFORE we remove the container data, else skips a level
                //var parentPane = Instance.hasParentLayout ? $.layout.getParentPaneInstance( $N ) : null;

                // reset layout-container
                $N	.clearQueue()
                    .removeData("layout")
                    .removeData("layoutContainer")
                    .removeClass(options.containerClass)
                    .unbind("."+ sID) // remove ALL Layout events
                ;

                // remove all mask elements that have been created
                $Ms.remove();

                // loop all panes to remove layout classes, attributes and bindings
                $.each(_c.allPanes, function (i, pane) {
                    removePane( pane, false, true, destroyChildren ); // true = skipResize
                });

                // do NOT reset container CSS if is a 'pane' (or 'content') in an outer-layout - ie, THIS layout is 'nested'
                var css = "layoutCSS";
                if ($N.data(css) && !$N.data("layoutRole")) // RESET CSS
                    $N.css( $N.data(css) ).removeData(css);

                // for full-page layouts, also reset the <HTML> CSS
                if (sC.tagName === "BODY" && ($N = $("html")).data(css)) // RESET <HTML> CSS
                    $N.css( $N.data(css) ).removeData(css);

                // trigger plugins for this layout, if there are any
                runPluginCallbacks( Instance, $.layout.onDestroy );

                // trigger status-management and onunload callback
                unload();

                // clear the Instance of everything except for container & options (so could recreate)
                // RE-CREATE: myLayout = myLayout.container.layout( myLayout.options );
                for (var n in Instance)
                    if (!n.match(/^(container|options)$/)) delete Instance[ n ];
                // add a 'destroyed' flag to make it easy to check
                Instance.destroyed = true;

                // if this is a child layout, CLEAR the child-pointer in the parent
                /* for now the pointer REMAINS, but with only container, options and destroyed keys
                 if (parentPane) {
                 var layout	= parentPane.pane.data("parentLayout")
                 ,	key		= layout.options.instanceKey || 'error';
                 // THIS SYNTAX MAY BE WRONG!
                 parentPane.children[key] = layout.children[ parentPane.name ].children[key] = null;
                 }
                 */

                return Instance; // for coding convenience
            }

        /**
         * Remove a pane from the layout - subroutine of destroy()
         *
         * @see  destroy()
         * @param {(string|Object)}	evt_or_pane			The pane to process
         * @param {boolean=}			[remove=false]		Remove the DOM element?
         * @param {boolean=}			[skipResize=false]	Skip calling resizeAll()?
         * @param {boolean=}			[destroyChild=true]	Destroy Child-layouts? If not passed, obeys options setting
         */
            ,	removePane = function (evt_or_pane, remove, skipResize, destroyChild) {
                if (!isInitialized()) return;
                var	pane = evtPane.call(this, evt_or_pane)
                    ,	$P	= $Ps[pane]
                    ,	$C	= $Cs[pane]
                    ,	$R	= $Rs[pane]
                    ,	$T	= $Ts[pane]
                    ;
                // NOTE: elements can still exist even after remove()
                //		so check for missing data(), which is cleared by removed()
                if ($P && $.isEmptyObject( $P.data() )) $P = false;
                if ($C && $.isEmptyObject( $C.data() )) $C = false;
                if ($R && $.isEmptyObject( $R.data() )) $R = false;
                if ($T && $.isEmptyObject( $T.data() )) $T = false;

                if ($P) $P.stop(true, true);

                var	o	= options[pane]
                    ,	s	= state[pane]
                    ,	d	= "layout"
                    ,	css	= "layoutCSS"
                    ,	pC	= children[pane]
                    ,	hasChildren	= $.isPlainObject( pC ) && !$.isEmptyObject( pC )
                    ,	destroy		= destroyChild !== undefined ? destroyChild : o.destroyChildren
                    ;
                // FIRST destroy the child-layout(s)
                if (hasChildren && destroy) {
                    $.each( pC, function (key, child) {
                        if (!child.destroyed)
                            child.destroy(true);// tell child-layout to destroy ALL its child-layouts too
                        if (child.destroyed)	// destroy was successful
                            delete pC[key];
                    });
                    // if no more children, remove the children hash
                    if ($.isEmptyObject( pC )) {
                        pC = children[pane] = null; // clear children hash
                        hasChildren = false;
                    }
                }

                // Note: can't 'remove' a pane element with non-destroyed children
                if ($P && remove && !hasChildren)
                    $P.remove(); // remove the pane-element and everything inside it
                else if ($P && $P[0]) {
                    //	create list of ALL pane-classes that need to be removed
                    var	root	= o.paneClass // default="ui-layout-pane"
                        ,	pRoot	= root +"-"+ pane // eg: "ui-layout-pane-west"
                        ,	_open	= "-open"
                        ,	_sliding= "-sliding"
                        ,	_closed	= "-closed"
                        ,	classes	= [	root, root+_open, root+_closed, root+_sliding,		// generic classes
                            pRoot, pRoot+_open, pRoot+_closed, pRoot+_sliding ]	// pane-specific classes
                        ;
                    $.merge(classes, getHoverClasses($P, true)); // ADD hover-classes
                    // remove all Layout classes from pane-element
                    $P	.removeClass( classes.join(" ") ) // remove ALL pane-classes
                        .removeData("parentLayout")
                        .removeData("layoutPane")
                        .removeData("layoutRole")
                        .removeData("layoutEdge")
                        .removeData("autoHidden")	// in case set
                        .unbind("."+ sID) // remove ALL Layout events
                        // TODO: remove these extra unbind commands when jQuery is fixed
                        //.unbind("mouseenter"+ sID)
                        //.unbind("mouseleave"+ sID)
                    ;
                    // do NOT reset CSS if this pane/content is STILL the container of a nested layout!
                    // the nested layout will reset its 'container' CSS when/if it is destroyed
                    if (hasChildren && $C) {
                        // a content-div may not have a specific width, so give it one to contain the Layout
                        $C.width( $C.width() );
                        $.each( pC, function (key, child) {
                            child.resizeAll(); // resize the Layout
                        });
                    }
                    else if ($C)
                        $C.css( $C.data(css) ).removeData(css).removeData("layoutRole");
                    // remove pane AFTER content in case there was a nested layout
                    if (!$P.data(d))
                        $P.css( $P.data(css) ).removeData(css);
                }

                // REMOVE pane resizer and toggler elements
                if ($T) $T.remove();
                if ($R) $R.remove();

                // CLEAR all pointers and status data
                Instance[pane] = $Ps[pane] = $Cs[pane] = $Rs[pane] = $Ts[pane] = false;
                s = { removed: true };

                if (!skipResize)
                    resizeAll();
            }


        /*
         * ###########################
         *	   ACTION METHODS
         * ###########################
         */

        /**
         * @param {string}	pane
         */
            ,	_hidePane = function (pane) {
                var $P	= $Ps[pane]
                    ,	o	= options[pane]
                    ,	s	= $P[0].style
                    ;
                if (o.useOffscreenClose) {
                    if (!$P.data(_c.offscreenReset))
                        $P.data(_c.offscreenReset, { left: s.left, right: s.right });
                    $P.css( _c.offscreenCSS );
                }
                else
                    $P.hide().removeData(_c.offscreenReset);
            }

        /**
         * @param {string}	pane
         */
            ,	_showPane = function (pane) {
                var $P	= $Ps[pane]
                    ,	o	= options[pane]
                    ,	off	= _c.offscreenCSS
                    ,	old	= $P.data(_c.offscreenReset)
                    ,	s	= $P[0].style
                    ;
                $P	.show() // ALWAYS show, just in case
                    .removeData(_c.offscreenReset);
                if (o.useOffscreenClose && old) {
                    if (s.left == off.left)
                        s.left = old.left;
                    if (s.right == off.right)
                        s.right = old.right;
                }
            }


        /**
         * Completely 'hides' a pane, including its spacing - as if it does not exist
         * The pane is not actually 'removed' from the source, so can use 'show' to un-hide it
         *
         * @param {(string|Object)}	evt_or_pane			The pane being hidden, ie: north, south, east, or west
         * @param {boolean=}			[noAnimation=false]
         */
            ,	hide = function (evt_or_pane, noAnimation) {
                if (!isInitialized()) return;
                var	pane = evtPane.call(this, evt_or_pane)
                    ,	o	= options[pane]
                    ,	s	= state[pane]
                    ,	$P	= $Ps[pane]
                    ,	$R	= $Rs[pane]
                    ;
                if (!$P || s.isHidden) return; // pane does not exist OR is already hidden

                // onhide_start callback - will CANCEL hide if returns false
                if (state.initialized && false === _runCallbacks("onhide_start", pane)) return;

                s.isSliding = false; // just in case
                delete state.panesSliding[pane];

                // now hide the elements
                if ($R) $R.hide(); // hide resizer-bar
                if (!state.initialized || s.isClosed) {
                    s.isClosed = true; // to trigger open-animation on show()
                    s.isHidden  = true;
                    s.isVisible = false;
                    if (!state.initialized)
                        _hidePane(pane); // no animation when loading page
                    sizeMidPanes(_c[pane].dir === "horz" ? "" : "center");
                    if (state.initialized || o.triggerEventsOnLoad)
                        _runCallbacks("onhide_end", pane);
                }
                else {
                    s.isHiding = true; // used by onclose
                    close(pane, false, noAnimation); // adjust all panes to fit
                }
            }

        /**
         * Show a hidden pane - show as 'closed' by default unless openPane = true
         *
         * @param {(string|Object)}	evt_or_pane			The pane being opened, ie: north, south, east, or west
         * @param {boolean=}			[openPane=false]
         * @param {boolean=}			[noAnimation=false]
         * @param {boolean=}			[noAlert=false]
         */
            ,	show = function (evt_or_pane, openPane, noAnimation, noAlert) {
                if (!isInitialized()) return;
                var	pane = evtPane.call(this, evt_or_pane)
                    ,	o	= options[pane]
                    ,	s	= state[pane]
                    ,	$P	= $Ps[pane]
                    ,	$R	= $Rs[pane]
                    ;
                if (!$P || !s.isHidden) return; // pane does not exist OR is not hidden

                // onshow_start callback - will CANCEL show if returns false
                if (false === _runCallbacks("onshow_start", pane)) return;

                s.isShowing = true; // used by onopen/onclose
                //s.isHidden  = false; - will be set by open/close - if not cancelled
                s.isSliding = false; // just in case
                delete state.panesSliding[pane];

                // now show the elements
                //if ($R) $R.show(); - will be shown by open/close
                if (openPane === false)
                    close(pane, true); // true = force
                else
                    open(pane, false, noAnimation, noAlert); // adjust all panes to fit
            }


        /**
         * Toggles a pane open/closed by calling either open or close
         *
         * @param {(string|Object)}	evt_or_pane		The pane being toggled, ie: north, south, east, or west
         * @param {boolean=}			[slide=false]
         */
            ,	toggle = function (evt_or_pane, slide) {
                if (!isInitialized()) return;
                var	evt		= evtObj(evt_or_pane)
                    ,	pane	= evtPane.call(this, evt_or_pane)
                    ,	s		= state[pane]
                    ;
                if (evt) // called from to $R.dblclick OR triggerPaneEvent
                    evt.stopImmediatePropagation();
                if (s.isHidden)
                    show(pane); // will call 'open' after unhiding it
                else if (s.isClosed)
                    open(pane, !!slide);
                else
                    close(pane);
            }


        /**
         * Utility method used during init or other auto-processes
         *
         * @param {string}	pane   The pane being closed
         * @param {boolean=}	[setHandles=false]
         */
            ,	_closePane = function (pane, setHandles) {
                var
                    $P	= $Ps[pane]
                    ,	s	= state[pane]
                    ;
                _hidePane(pane);
                s.isClosed = true;
                s.isVisible = false;
                if (setHandles) setAsClosed(pane);
            }

        /**
         * Close the specified pane (animation optional), and resize all other panes as needed
         *
         * @param {(string|Object)}	evt_or_pane			The pane being closed, ie: north, south, east, or west
         * @param {boolean=}			[force=false]
         * @param {boolean=}			[noAnimation=false]
         * @param {boolean=}			[skipCallback=false]
         */
            ,	close = function (evt_or_pane, force, noAnimation, skipCallback) {
                var	pane = evtPane.call(this, evt_or_pane);
                // if pane has been initialized, but NOT the complete layout, close pane instantly
                if (!state.initialized && $Ps[pane]) {
                    _closePane(pane, true); // INIT pane as closed
                    return;
                }
                if (!isInitialized()) return;

                var
                    $P	= $Ps[pane]
                    ,	$R	= $Rs[pane]
                    ,	$T	= $Ts[pane]
                    ,	o	= options[pane]
                    ,	s	= state[pane]
                    ,	c	= _c[pane]
                    ,	doFX, isShowing, isHiding, wasSliding;

                // QUEUE in case another action/animation is in progress
                $N.queue(function( queueNext ){

                    if ( !$P
                        ||	(!o.closable && !s.isShowing && !s.isHiding)	// invalid request // (!o.resizable && !o.closable) ???
                        ||	(!force && s.isClosed && !s.isShowing)			// already closed
                        ) return queueNext();

                    // onclose_start callback - will CANCEL hide if returns false
                    // SKIP if just 'showing' a hidden pane as 'closed'
                    var abort = !s.isShowing && false === _runCallbacks("onclose_start", pane);

                    // transfer logic vars to temp vars
                    isShowing	= s.isShowing;
                    isHiding	= s.isHiding;
                    wasSliding	= s.isSliding;
                    // now clear the logic vars (REQUIRED before aborting)
                    delete s.isShowing;
                    delete s.isHiding;

                    if (abort) return queueNext();

                    doFX		= !noAnimation && !s.isClosed && (o.fxName_close != "none");
                    s.isMoving	= true;
                    s.isClosed	= true;
                    s.isVisible	= false;
                    // update isHidden BEFORE sizing panes
                    if (isHiding) s.isHidden = true;
                    else if (isShowing) s.isHidden = false;

                    if (s.isSliding) // pane is being closed, so UNBIND trigger events
                        bindStopSlidingEvents(pane, false); // will set isSliding=false
                    else // resize panes adjacent to this one
                        sizeMidPanes(_c[pane].dir === "horz" ? "" : "center", false); // false = NOT skipCallback

                    // if this pane has a resizer bar, sample it NOW - before animation
                    setAsClosed(pane);

                    // CLOSE THE PANE
                    if (doFX) { // animate the close
                        lockPaneForFX(pane, true);	// need to set left/top so animation will work
                        $P.hide( o.fxName_close, o.fxSettings_close, o.fxSpeed_close, function () {
                            lockPaneForFX(pane, false); // undo
                            if (s.isClosed) close_2();
                            queueNext();
                        });
                    }
                    else { // hide the pane without animation
                        _hidePane(pane);
                        close_2();
                        queueNext();
                    };
                });

                // SUBROUTINE
                function close_2 () {
                    s.isMoving	= false;
                    bindStartSlidingEvents(pane, true); // will enable if o.slidable = true

                    // if opposite-pane was autoClosed, see if it can be autoOpened now
                    var altPane = _c.oppositeEdge[pane];
                    if (state[ altPane ].noRoom) {
                        setSizeLimits( altPane );
                        makePaneFit( altPane );
                    }

                    if (!skipCallback && (state.initialized || o.triggerEventsOnLoad)) {
                        // onclose callback - UNLESS just 'showing' a hidden pane as 'closed'
                        if (!isShowing)	_runCallbacks("onclose_end", pane);
                        // onhide OR onshow callback
                        if (isShowing)	_runCallbacks("onshow_end", pane);
                        if (isHiding)	_runCallbacks("onhide_end", pane);
                    }
                }
            }

        /**
         * @param {string}	pane	The pane just closed, ie: north, south, east, or west
         */
            ,	setAsClosed = function (pane) {
                if (!$Rs[pane]) return; // handles not initialized yet!
                var
                    $P		= $Ps[pane]
                    ,	$R		= $Rs[pane]
                    ,	$T		= $Ts[pane]
                    ,	o		= options[pane]
                    ,	s		= state[pane]
                    ,	side	= _c[pane].side
                    ,	rClass	= o.resizerClass
                    ,	tClass	= o.togglerClass
                    ,	_pane	= "-"+ pane // used for classNames
                    ,	_open	= "-open"
                    ,	_sliding= "-sliding"
                    ,	_closed	= "-closed"
                    ;
                $R
                    .css(side, sC.inset[side]) // sample the resizer
                    .removeClass( rClass+_open +" "+ rClass+_pane+_open )
                    .removeClass( rClass+_sliding +" "+ rClass+_pane+_sliding )
                    .addClass( rClass+_closed +" "+ rClass+_pane+_closed )
                ;
                // DISABLE 'resizing' when closed - do this BEFORE bindStartSlidingEvents?
                if (o.resizable && $.layout.plugins.draggable)
                    $R
                        .draggable("disable")
                        .removeClass("ui-status-disabled") // do NOT apply disabled styling - not suitable here
                        .css("cursor", "default")
                        .attr("title","")
                    ;

                // if pane has a toggler button, adjust that too
                if ($T) {
                    $T
                        .removeClass( tClass+_open +" "+ tClass+_pane+_open )
                        .addClass( tClass+_closed +" "+ tClass+_pane+_closed )
                        .attr("title", o.tips.Open) // may be blank
                    ;
                    // toggler-content - if exists
                    $T.children(".content-open").hide();
                    $T.children(".content-closed").css("display","block");
                }

                // sync any 'pin buttons'
                syncPinBtns(pane, false);

                if (state.initialized) {
                    // resize 'length' and position togglers for adjacent panes
                    sizeHandles();
                }
            }

        /**
         * Open the specified pane (animation optional), and resize all other panes as needed
         *
         * @param {(string|Object)}	evt_or_pane			The pane being opened, ie: north, south, east, or west
         * @param {boolean=}			[slide=false]
         * @param {boolean=}			[noAnimation=false]
         * @param {boolean=}			[noAlert=false]
         */
            ,	open = function (evt_or_pane, slide, noAnimation, noAlert) {
                if (!isInitialized()) return;
                var	pane = evtPane.call(this, evt_or_pane)
                    ,	$P	= $Ps[pane]
                    ,	$R	= $Rs[pane]
                    ,	$T	= $Ts[pane]
                    ,	o	= options[pane]
                    ,	s	= state[pane]
                    ,	c	= _c[pane]
                    ,	doFX, isShowing
                    ;
                // QUEUE in case another action/animation is in progress
                $N.queue(function( queueNext ){

                    if ( !$P
                        ||	(!o.resizable && !o.closable && !s.isShowing)	// invalid request
                        ||	(s.isVisible && !s.isSliding)					// already open
                        ) return queueNext();

                    // pane can ALSO be unhidden by just calling show(), so handle this scenario
                    if (s.isHidden && !s.isShowing) {
                        queueNext(); // call before show() because it needs the queue free
                        show(pane, true);
                        return;
                    }

                    if (s.autoResize && s.size != o.size) // resize pane to original size set in options
                        sizePane(pane, o.size, true, true, true); // true=skipCallback/noAnimation/forceResize
                    else
                    // make sure there is enough space available to open the pane
                        setSizeLimits(pane, slide);

                    // onopen_start callback - will CANCEL open if returns false
                    var cbReturn = _runCallbacks("onopen_start", pane);

                    if (cbReturn === "abort")
                        return queueNext();

                    // update pane-status again in case options were changed in onopen_start
                    if (cbReturn !== "NC") // NC = "No Callback"
                        setSizeLimits(pane, slide);

                    if (s.minSize > s.maxSize) { // INSUFFICIENT ROOM FOR PANE TO OPEN!
                        syncPinBtns(pane, false); // make sure pin-buttons are reset
                        if (!noAlert && o.tips.noRoomToOpen)
                            alert(o.tips.noRoomToOpen);
                        return queueNext(); // ABORT
                    }

                    if (slide) // START Sliding - will set isSliding=true
                        bindStopSlidingEvents(pane, true); // BIND trigger events to close sliding-pane
                    else if (s.isSliding) // PIN PANE (stop sliding) - open pane 'normally' instead
                        bindStopSlidingEvents(pane, false); // UNBIND trigger events - will set isSliding=false
                    else if (o.slidable)
                        bindStartSlidingEvents(pane, false); // UNBIND trigger events

                    s.noRoom = false; // will be reset by makePaneFit if 'noRoom'
                    makePaneFit(pane);

                    // transfer logic var to temp var
                    isShowing = s.isShowing;
                    // now clear the logic var
                    delete s.isShowing;

                    doFX		= !noAnimation && s.isClosed && (o.fxName_open != "none");
                    s.isMoving	= true;
                    s.isVisible	= true;
                    s.isClosed	= false;
                    // update isHidden BEFORE sizing panes - WHY??? Old?
                    if (isShowing) s.isHidden = false;

                    if (doFX) { // ANIMATE
                        // mask adjacent panes with objects
                        lockPaneForFX(pane, true);	// need to set left/top so animation will work
                        $P.show( o.fxName_open, o.fxSettings_open, o.fxSpeed_open, function() {
                            lockPaneForFX(pane, false); // undo
                            if (s.isVisible) open_2(); // continue
                            queueNext();
                        });
                    }
                    else { // no animation
                        _showPane(pane);// just show pane and...
                        open_2();		// continue
                        queueNext();
                    };
                });

                // SUBROUTINE
                function open_2 () {
                    s.isMoving	= false;

                    // cure iframe display issues
                    _fixIframe(pane);

                    // NOTE: if isSliding, then other panes are NOT 'resized'
                    if (!s.isSliding) { // resize all panes adjacent to this one
                        sizeMidPanes(_c[pane].dir=="vert" ? "center" : "", false); // false = NOT skipCallback
                    }

                    // set classes, position handles and execute callbacks...
                    setAsOpen(pane);
                };

            }

        /**
         * @param {string}	pane		The pane just opened, ie: north, south, east, or west
         * @param {boolean=}	[skipCallback=false]
         */
            ,	setAsOpen = function (pane, skipCallback) {
                var
                    $P		= $Ps[pane]
                    ,	$R		= $Rs[pane]
                    ,	$T		= $Ts[pane]
                    ,	o		= options[pane]
                    ,	s		= state[pane]
                    ,	side	= _c[pane].side
                    ,	rClass	= o.resizerClass
                    ,	tClass	= o.togglerClass
                    ,	_pane	= "-"+ pane // used for classNames
                    ,	_open	= "-open"
                    ,	_closed	= "-closed"
                    ,	_sliding= "-sliding"
                    ;
                $R
                    .css(side, sC.inset[side] + getPaneSize(pane)) // sample the resizer
                    .removeClass( rClass+_closed +" "+ rClass+_pane+_closed )
                    .addClass( rClass+_open +" "+ rClass+_pane+_open )
                ;
                if (s.isSliding)
                    $R.addClass( rClass+_sliding +" "+ rClass+_pane+_sliding )
                else // in case 'was sliding'
                    $R.removeClass( rClass+_sliding +" "+ rClass+_pane+_sliding )

                removeHover( 0, $R ); // remove hover classes
                if (o.resizable && $.layout.plugins.draggable)
                    $R	.draggable("enable")
                        .css("cursor", o.resizerCursor)
                        .attr("title", o.tips.Resize);
                else if (!s.isSliding)
                    $R.css("cursor", "default"); // n-resize, s-resize, etc

                // if pane also has a toggler button, adjust that too
                if ($T) {
                    $T	.removeClass( tClass+_closed +" "+ tClass+_pane+_closed )
                        .addClass( tClass+_open +" "+ tClass+_pane+_open )
                        .attr("title", o.tips.Close); // may be blank
                    removeHover( 0, $T ); // remove hover classes
                    // toggler-content - if exists
                    $T.children(".content-closed").hide();
                    $T.children(".content-open").css("display","block");
                }

                // sync any 'pin buttons'
                syncPinBtns(pane, !s.isSliding);

                // update pane-status dimensions - BEFORE resizing content
                $.extend(s, elDims($P));

                if (state.initialized) {
                    // resize resizer & toggler sizes for all panes
                    sizeHandles();
                    // resize content every time pane opens - to be sure
                    sizeContent(pane, true); // true = remeasure headers/footers, even if 'pane.isMoving'
                }

                if (!skipCallback && (state.initialized || o.triggerEventsOnLoad) && $P.is(":visible")) {
                    // onopen callback
                    _runCallbacks("onopen_end", pane);
                    // onshow callback - TODO: should this be here?
                    if (s.isShowing) _runCallbacks("onshow_end", pane);

                    // ALSO call onresize because layout-size *may* have changed while pane was closed
                    if (state.initialized)
                        _runCallbacks("onresize_end", pane);
                }

                // TODO: Somehow sizePane("north") is being called after this point???
            }


        /**
         * slideOpen / slideClose / slideToggle
         *
         * Pass-though methods for sliding
         */
            ,	slideOpen = function (evt_or_pane) {
                if (!isInitialized()) return;
                var	evt		= evtObj(evt_or_pane)
                    ,	pane	= evtPane.call(this, evt_or_pane)
                    ,	s		= state[pane]
                    ,	delay	= options[pane].slideDelay_open
                    ;
                // prevent event from triggering on NEW resizer binding created below
                if (evt) evt.stopImmediatePropagation();

                if (s.isClosed && evt && evt.type === "mouseenter" && delay > 0)
                // trigger = mouseenter - use a delay
                    timer.set(pane+"_openSlider", open_NOW, delay);
                else
                    open_NOW(); // will unbind events if is already open

                /**
                 * SUBROUTINE for timed open
                 */
                function open_NOW () {
                    if (!s.isClosed) // skip if no longer closed!
                        bindStopSlidingEvents(pane, true); // BIND trigger events to close sliding-pane
                    else if (!s.isMoving)
                        open(pane, true); // true = slide - open() will handle binding
                };
            }

            ,	slideClose = function (evt_or_pane) {
                if (!isInitialized()) return;
                var	evt		= evtObj(evt_or_pane)
                    ,	pane	= evtPane.call(this, evt_or_pane)
                    ,	o		= options[pane]
                    ,	s		= state[pane]
                    ,	delay	= s.isMoving ? 1000 : 300 // MINIMUM delay - option may override
                    ;
                if (s.isClosed || s.isResizing)
                    return; // skip if already closed OR in process of resizing
                else if (o.slideTrigger_close === "click")
                    close_NOW(); // close immediately onClick
                else if (o.preventQuickSlideClose && s.isMoving)
                    return; // handle Chrome quick-close on slide-open
                else if (o.preventPrematureSlideClose && evt && $.layout.isMouseOverElem(evt, $Ps[pane]))
                    return; // handle incorrect mouseleave trigger, like when over a SELECT-list in IE
                else if (evt) // trigger = mouseleave - use a delay
                // 1 sec delay if 'opening', else .3 sec
                    timer.set(pane+"_closeSlider", close_NOW, max(o.slideDelay_close, delay));
                else // called programically
                    close_NOW();

                /**
                 * SUBROUTINE for timed close
                 */
                function close_NOW () {
                    if (s.isClosed) // skip 'close' if already closed!
                        bindStopSlidingEvents(pane, false); // UNBIND trigger events - TODO: is this needed here?
                    else if (!s.isMoving)
                        close(pane); // close will handle unbinding
                };
            }

        /**
         * @param {(string|Object)}	evt_or_pane		The pane being opened, ie: north, south, east, or west
         */
            ,	slideToggle = function (evt_or_pane) {
                var pane = evtPane.call(this, evt_or_pane);
                toggle(pane, true);
            }


        /**
         * Must set left/top on East/South panes so animation will work properly
         *
         * @param {string}	pane	The pane to lock, 'east' or 'south' - any other is ignored!
         * @param {boolean}	doLock  true = set left/top, false = remove
         */
            ,	lockPaneForFX = function (pane, doLock) {
                var $P	= $Ps[pane]
                    ,	s	= state[pane]
                    ,	o	= options[pane]
                    ,	z	= options.zIndexes
                    ;
                if (doLock) {
                    showMasks( pane, { animation: true, objectsOnly: true });
                    $P.css({ zIndex: z.pane_animate }); // overlay all elements during animation
                    if (pane=="south")
                        $P.css({ top: sC.inset.top + sC.innerHeight - $P.outerHeight() });
                    else if (pane=="east")
                        $P.css({ left: sC.inset.left + sC.innerWidth - $P.outerWidth() });
                }
                else { // animation DONE - RESET CSS
                    hideMasks();
                    $P.css({ zIndex: (s.isSliding ? z.pane_sliding : z.pane_normal) });
                    if (pane=="south")
                        $P.css({ top: "auto" });
                    // if pane is positioned 'off-screen', then DO NOT screw with it!
                    else if (pane=="east" && !$P.css("left").match(/\-99999/))
                        $P.css({ left: "auto" });
                    // fix anti-aliasing in IE - only needed for animations that change opacity
                    if (browser.msie && o.fxOpacityFix && o.fxName_open != "slide" && $P.css("filter") && $P.css("opacity") == 1)
                        $P[0].style.removeAttribute('filter');
                }
            }


        /**
         * Toggle sliding functionality of a specific pane on/off by adding removing 'slide open' trigger
         *
         * @see  open(), close()
         * @param {string}	pane	The pane to enable/disable, 'north', 'south', etc.
         * @param {boolean}	enable	Enable or Disable sliding?
         */
            ,	bindStartSlidingEvents = function (pane, enable) {
                var o		= options[pane]
                    ,	$P		= $Ps[pane]
                    ,	$R		= $Rs[pane]
                    ,	evtName	= o.slideTrigger_open.toLowerCase()
                    ;
                if (!$R || (enable && !o.slidable)) return;

                // make sure we have a valid event
                if (evtName.match(/mouseover/))
                    evtName = o.slideTrigger_open = "mouseenter";
                else if (!evtName.match(/(click|dblclick|mouseenter)/))
                    evtName = o.slideTrigger_open = "click";

                // must remove double-click-toggle when using dblclick-slide
                if (o.resizerDblClickToggle && evtName.match(/click/)) {
                    $R[enable ? "unbind" : "bind"]('dblclick.'+ sID, toggle)
                }

                $R
                    // add or remove event
                    [enable ? "bind" : "unbind"](evtName +'.'+ sID, slideOpen)
                    // set the appropriate cursor & title/tip
                    .css("cursor", enable ? o.sliderCursor : "default")
                    .attr("title", enable ? o.tips.Slide : "")
                ;
            }

        /**
         * Add or remove 'mouseleave' events to 'slide close' when pane is 'sliding' open or closed
         * Also increases zIndex when pane is sliding open
         * See bindStartSlidingEvents for code to control 'slide open'
         *
         * @see  slideOpen(), slideClose()
         * @param {string}	pane	The pane to process, 'north', 'south', etc.
         * @param {boolean}	enable	Enable or Disable events?
         */
            ,	bindStopSlidingEvents = function (pane, enable) {
                var	o		= options[pane]
                    ,	s		= state[pane]
                    ,	c		= _c[pane]
                    ,	z		= options.zIndexes
                    ,	evtName	= o.slideTrigger_close.toLowerCase()
                    ,	action	= (enable ? "bind" : "unbind")
                    ,	$P		= $Ps[pane]
                    ,	$R		= $Rs[pane]
                    ;
                timer.clear(pane+"_closeSlider"); // just in case

                if (enable) {
                    s.isSliding = true;
                    state.panesSliding[pane] = true;
                    // remove 'slideOpen' event from resizer
                    // ALSO will raise the zIndex of the pane & resizer
                    bindStartSlidingEvents(pane, false);
                }
                else {
                    s.isSliding = false;
                    delete state.panesSliding[pane];
                }

                // RE/SET zIndex - increases when pane is sliding-open, resets to normal when not
                $P.css("zIndex", enable ? z.pane_sliding : z.pane_normal);
                $R.css("zIndex", enable ? z.pane_sliding+2 : z.resizer_normal); // NOTE: mask = pane_sliding+1

                // make sure we have a valid event
                if (!evtName.match(/(click|mouseleave)/))
                    evtName = o.slideTrigger_close = "mouseleave"; // also catches 'mouseout'

                // add/remove slide triggers
                $R[action](evtName, slideClose); // base event on resize
                // need extra events for mouseleave
                if (evtName === "mouseleave") {
                    // also close on pane.mouseleave
                    $P[action]("mouseleave."+ sID, slideClose);
                    // cancel timer when mouse moves between 'pane' and 'resizer'
                    $R[action]("mouseenter."+ sID, cancelMouseOut);
                    $P[action]("mouseenter."+ sID, cancelMouseOut);
                }

                if (!enable)
                    timer.clear(pane+"_closeSlider");
                else if (evtName === "click" && !o.resizable) {
                    // IF pane is not resizable (which already has a cursor and tip)
                    // then set the a cursor & title/tip on resizer when sliding
                    $R.css("cursor", enable ? o.sliderCursor : "default");
                    $R.attr("title", enable ? o.tips.Close : ""); // use Toggler-tip, eg: "Close Pane"
                }

                // SUBROUTINE for mouseleave timer clearing
                function cancelMouseOut (evt) {
                    timer.clear(pane+"_closeSlider");
                    evt.stopPropagation();
                }
            }


        /**
         * Hides/closes a pane if there is insufficient room - reverses this when there is room again
         * MUST have already called setSizeLimits() before calling this method
         *
         * @param {string}	pane					The pane being resized
         * @param {boolean=}	[isOpening=false]		Called from onOpen?
         * @param {boolean=}	[skipCallback=false]	Should the onresize callback be run?
         * @param {boolean=}	[force=false]
         */
            ,	makePaneFit = function (pane, isOpening, skipCallback, force) {
                var	o	= options[pane]
                    ,	s	= state[pane]
                    ,	c	= _c[pane]
                    ,	$P	= $Ps[pane]
                    ,	$R	= $Rs[pane]
                    ,	isSidePane 	= c.dir==="vert"
                    ,	hasRoom		= false
                    ;
                // special handling for center & east/west panes
                if (pane === "center" || (isSidePane && s.noVerticalRoom)) {
                    // see if there is enough room to display the pane
                    // ERROR: hasRoom = s.minHeight <= s.maxHeight && (isSidePane || s.minWidth <= s.maxWidth);
                    hasRoom = (s.maxHeight >= 0);
                    if (hasRoom && s.noRoom) { // previously hidden due to noRoom, so show now
                        _showPane(pane);
                        if ($R) $R.show();
                        s.isVisible = true;
                        s.noRoom = false;
                        if (isSidePane) s.noVerticalRoom = false;
                        _fixIframe(pane);
                    }
                    else if (!hasRoom && !s.noRoom) { // not currently hidden, so hide now
                        _hidePane(pane);
                        if ($R) $R.hide();
                        s.isVisible = false;
                        s.noRoom = true;
                    }
                }

                // see if there is enough room to fit the border-pane
                if (pane === "center") {
                    // ignore center in this block
                }
                else if (s.minSize <= s.maxSize) { // pane CAN fit
                    hasRoom = true;
                    if (s.size > s.maxSize) // pane is too big - shrink it
                        sizePane(pane, s.maxSize, skipCallback, true, force); // true = noAnimation
                    else if (s.size < s.minSize) // pane is too small - enlarge it
                        sizePane(pane, s.minSize, skipCallback, true, force); // true = noAnimation
                    // need s.isVisible because new pseudoClose method keeps pane visible, but off-screen
                    else if ($R && s.isVisible && $P.is(":visible")) {
                        // make sure resizer-bar is positioned correctly
                        // handles situation where nested layout was 'hidden' when initialized
                        var	pos = s.size + sC.inset[c.side];
                        if ($.layout.cssNum( $R, c.side ) != pos) $R.css( c.side, pos );
                    }

                    // if was previously hidden due to noRoom, then RESET because NOW there is room
                    if (s.noRoom) {
                        // s.noRoom status will be set by open or show
                        if (s.wasOpen && o.closable) {
                            if (o.autoReopen)
                                open(pane, false, true, true); // true = noAnimation, true = noAlert
                            else // leave the pane closed, so just update status
                                s.noRoom = false;
                        }
                        else
                            show(pane, s.wasOpen, true, true); // true = noAnimation, true = noAlert
                    }
                }
                else { // !hasRoom - pane CANNOT fit
                    if (!s.noRoom) { // pane not set as noRoom yet, so hide or close it now...
                        s.noRoom = true; // update status
                        s.wasOpen = !s.isClosed && !s.isSliding;
                        if (s.isClosed){} // SKIP
                        else if (o.closable) // 'close' if possible
                            close(pane, true, true); // true = force, true = noAnimation
                        else // 'hide' pane if cannot just be closed
                            hide(pane, true); // true = noAnimation
                    }
                }
            }


        /**
         * manualSizePane is an exposed flow-through method allowing extra code when pane is 'manually resized'
         *
         * @param {(string|Object)}	evt_or_pane				The pane being resized
         * @param {number}			size					The *desired* new size for this pane - will be validated
         * @param {boolean=}			[skipCallback=false]	Should the onresize callback be run?
         * @param {boolean=}			[noAnimation=false]
         * @param {boolean=}			[force=false]			Force resizing even if does not seem necessary
         */
            ,	manualSizePane = function (evt_or_pane, size, skipCallback, noAnimation, force) {
                if (!isInitialized()) return;
                var	pane = evtPane.call(this, evt_or_pane)
                    ,	o	= options[pane]
                    ,	s	= state[pane]
                //	if resizing callbacks have been delayed and resizing is now DONE, force resizing to complete...
                    ,	forceResize = force || (o.livePaneResizing && !s.isResizing)
                    ;
                // ANY call to manualSizePane disables autoResize - ie, percentage sizing
                s.autoResize = false;
                // flow-through...
                sizePane(pane, size, skipCallback, noAnimation, forceResize); // will animate resize if option enabled
            }

        /**
         * sizePane is called only by internal methods whenever a pane needs to be resized
         *
         * @param {(string|Object)}	evt_or_pane				The pane being resized
         * @param {number}			size					The *desired* new size for this pane - will be validated
         * @param {boolean=}			[skipCallback=false]	Should the onresize callback be run?
         * @param {boolean=}			[noAnimation=false]
         * @param {boolean=}			[force=false]			Force resizing even if does not seem necessary
         */
            ,	sizePane = function (evt_or_pane, size, skipCallback, noAnimation, force) {
                if (!isInitialized()) return;
                var	pane	= evtPane.call(this, evt_or_pane) // probably NEVER called from event?
                    ,	o		= options[pane]
                    ,	s		= state[pane]
                    ,	$P		= $Ps[pane]
                    ,	$R		= $Rs[pane]
                    ,	side	= _c[pane].side
                    ,	dimName	= _c[pane].sizeType.toLowerCase()
                    ,	skipResizeWhileDragging = s.isResizing && !o.triggerEventsDuringLiveResize
                    ,	doFX	= noAnimation !== true && o.animatePaneSizing
                    ,	oldSize, newSize
                    ;
                // QUEUE in case another action/animation is in progress
                $N.queue(function( queueNext ){
                    // calculate 'current' min/max sizes
                    setSizeLimits(pane); // update pane-status
                    oldSize = s.size;
                    size = _parseSize(pane, size); // handle percentages & auto
                    size = max(size, _parseSize(pane, o.minSize));
                    size = min(size, s.maxSize);
                    if (size < s.minSize) { // not enough room for pane!
                        queueNext(); // call before makePaneFit() because it needs the queue free
                        makePaneFit(pane, false, skipCallback);	// will hide or close pane
                        return;
                    }

                    // IF newSize is same as oldSize, then nothing to do - abort
                    if (!force && size === oldSize)
                        return queueNext();

                    s.newSize = size;

                    // onresize_start callback CANNOT cancel resizing because this would break the layout!
                    if (!skipCallback && state.initialized && s.isVisible)
                        _runCallbacks("onresize_start", pane);

                    // resize the pane, and make sure its visible
                    newSize = cssSize(pane, size);

                    if (doFX && $P.is(":visible")) { // ANIMATE
                        var fx		= $.layout.effects.size[pane] || $.layout.effects.size.all
                            ,	easing	= o.fxSettings_size.easing || fx.easing
                            ,	z		= options.zIndexes
                            ,	props	= {};
                        props[ dimName ] = newSize +'px';
                        s.isMoving = true;
                        // overlay all elements during animation
                        $P.css({ zIndex: z.pane_animate })
                            .show().animate( props, o.fxSpeed_size, easing, function(){
                                // reset zIndex after animation
                                $P.css({ zIndex: (s.isSliding ? z.pane_sliding : z.pane_normal) });
                                s.isMoving = false;
                                delete s.newSize;
                                sizePane_2(); // continue
                                queueNext();
                            });
                    }
                    else { // no animation
                        $P.css( dimName, newSize );	// resize pane
                        delete s.newSize;
                        // if pane is visible, then
                        if ($P.is(":visible"))
                            sizePane_2(); // continue
                        else {
                            // pane is NOT VISIBLE, so just update status data...
                            // when pane is *next opened*, it will have the new size
                            s.size = size;				// update status.size
                            $.extend(s, elDims($P));	// update status dimensions
                        }
                        queueNext();
                    };

                });

                // SUBROUTINE
                function sizePane_2 () {
                    /*	Panes are sometimes not sized precisely in some browsers!?
                     *	This code will resize the pane up to 3 times to nudge the pane to the correct size
                     */
                    var	actual	= dimName==='width' ? $P.outerWidth() : $P.outerHeight()
                        ,	tries	= [{
                            pane:		pane
                            ,	count:		1
                            ,	target:		size
                            ,	actual:		actual
                            ,	correct:	(size === actual)
                            ,	attempt:	size
                            ,	cssSize:	newSize
                        }]
                        ,	lastTry = tries[0]
                        ,	thisTry	= {}
                        ,	msg		= 'Inaccurate size after resizing the '+ pane +'-pane.'
                        ;
                    while ( !lastTry.correct ) {
                        thisTry = { pane: pane, count: lastTry.count+1, target: size };

                        if (lastTry.actual > size)
                            thisTry.attempt = max(0, lastTry.attempt - (lastTry.actual - size));
                        else // lastTry.actual < size
                            thisTry.attempt = max(0, lastTry.attempt + (size - lastTry.actual));

                        thisTry.cssSize = cssSize(pane, thisTry.attempt);
                        $P.css( dimName, thisTry.cssSize );

                        thisTry.actual	= dimName=='width' ? $P.outerWidth() : $P.outerHeight();
                        thisTry.correct	= (size === thisTry.actual);

                        // log attempts and alert the user of this *non-fatal error* (if showDebugMessages)
                        if ( tries.length === 1) {
                            _log(msg, false, true);
                            _log(lastTry, false, true);
                        }
                        _log(thisTry, false, true);
                        // after 4 tries, is as close as its gonna get!
                        if (tries.length > 3) break;

                        tries.push( thisTry );
                        lastTry = tries[ tries.length - 1 ];
                    }
                    // END TESTING CODE

                    // update pane-status dimensions
                    s.size	= size;
                    $.extend(s, elDims($P));

                    if (s.isVisible && $P.is(":visible")) {
                        // reposition the resizer-bar
                        if ($R) $R.css( side, size + sC.inset[side] );
                        // resize the content-div
                        sizeContent(pane);
                    }

                    if (!skipCallback && !skipResizeWhileDragging && state.initialized && s.isVisible)
                        _runCallbacks("onresize_end", pane);

                    // resize all the adjacent panes, and adjust their toggler buttons
                    // when skipCallback passed, it means the controlling method will handle 'other panes'
                    if (!skipCallback) {
                        // also no callback if live-resize is in progress and NOT triggerEventsDuringLiveResize
                        if (!s.isSliding) sizeMidPanes(_c[pane].dir=="horz" ? "" : "center", skipResizeWhileDragging, force);
                        sizeHandles();
                    }

                    // if opposite-pane was autoClosed, see if it can be autoOpened now
                    var altPane = _c.oppositeEdge[pane];
                    if (size < oldSize && state[ altPane ].noRoom) {
                        setSizeLimits( altPane );
                        makePaneFit( altPane, false, skipCallback );
                    }

                    // DEBUG - ALERT user/developer so they know there was a sizing problem
                    if (tries.length > 1)
                        _log(msg +'\nSee the Error Console for details.', true, true);
                }
            }

        /**
         * @see  initPanes(), sizePane(), 	resizeAll(), open(), close(), hide()
         * @param {(Array.<string>|string)}	panes					The pane(s) being resized, comma-delmited string
         * @param {boolean=}					[skipCallback=false]	Should the onresize callback be run?
         * @param {boolean=}					[force=false]
         */
            ,	sizeMidPanes = function (panes, skipCallback, force) {
                panes = (panes ? panes : "east,west,center").split(",");

                $.each(panes, function (i, pane) {
                    if (!$Ps[pane]) return; // NO PANE - skip
                    var
                        o		= options[pane]
                        ,	s		= state[pane]
                        ,	$P		= $Ps[pane]
                        ,	$R		= $Rs[pane]
                        ,	isCenter= (pane=="center")
                        ,	hasRoom	= true
                        ,	CSS		= {}
                    //	if pane is not visible, show it invisibly NOW rather than for *each call* in this script
                        ,	visCSS	= $.layout.showInvisibly($P)

                        ,	newCenter	= calcNewCenterPaneDims()
                        ;

                    // update pane-status dimensions
                    $.extend(s, elDims($P));

                    if (pane === "center") {
                        if (!force && s.isVisible && newCenter.width === s.outerWidth && newCenter.height === s.outerHeight) {
                            $P.css(visCSS);
                            return true; // SKIP - pane already the correct size
                        }
                        // set status for makePaneFit() logic
                        $.extend(s, cssMinDims(pane), {
                            maxWidth:	newCenter.width
                            ,	maxHeight:	newCenter.height
                        });
                        CSS = newCenter;
                        //zhangkaitao 使center的iframe撑满整屏
//                        CSS.top = CSS.top + 35;
//                        if($P.is("iframe[tabs=true]")){
//                            CSS.height = CSS.height - 45;
//                        }
//                        CSS.width = CSS.width + 5;

                        s.newWidth	= CSS.width;
                        s.newHeight	= CSS.height;
                        // convert OUTER width/height to CSS width/height 
                        CSS.width	= cssW($P, CSS.width);
                        // NEW - allow pane to extend 'below' visible area rather than hide it
                        CSS.height	= cssH($P, CSS.height);
                        hasRoom		= CSS.width >= 0 && CSS.height >= 0; // height >= 0 = ALWAYS TRUE NOW

                        // during layout init, try to shrink east/west panes to make room for center
                        if (!state.initialized && o.minWidth > newCenter.width) {
                            var
                                reqPx	= o.minWidth - s.outerWidth
                                ,	minE	= options.east.minSize || 0
                                ,	minW	= options.west.minSize || 0
                                ,	sizeE	= state.east.size
                                ,	sizeW	= state.west.size
                                ,	newE	= sizeE
                                ,	newW	= sizeW
                                ;
                            if (reqPx > 0 && state.east.isVisible && sizeE > minE) {
                                newE = max( sizeE-minE, sizeE-reqPx );
                                reqPx -= sizeE-newE;
                            }
                            if (reqPx > 0 && state.west.isVisible && sizeW > minW) {
                                newW = max( sizeW-minW, sizeW-reqPx );
                                reqPx -= sizeW-newW;
                            }
                            // IF we found enough extra space, then resize the border panes as calculated
                            if (reqPx === 0) {
                                if (sizeE && sizeE != minE)
                                    sizePane('east', newE, true, true, force); // true = skipCallback/noAnimation - initPanes will handle when done
                                if (sizeW && sizeW != minW)
                                    sizePane('west', newW, true, true, force); // true = skipCallback/noAnimation
                                // now start over!
                                sizeMidPanes('center', skipCallback, force);
                                $P.css(visCSS);
                                return; // abort this loop
                            }
                        }
                    }
                    else { // for east and west, set only the height, which is same as center height
                        // set status.min/maxWidth/Height for makePaneFit() logic
                        if (s.isVisible && !s.noVerticalRoom)
                            $.extend(s, elDims($P), cssMinDims(pane))
                        if (!force && !s.noVerticalRoom && newCenter.height === s.outerHeight) {
                            $P.css(visCSS);
                            return true; // SKIP - pane already the correct size
                        }
                        // east/west have same top, bottom & height as center
                        CSS.top		= newCenter.top;
                        CSS.bottom	= newCenter.bottom;
                        s.newSize	= newCenter.height
                        // NEW - allow pane to extend 'below' visible area rather than hide it
                        CSS.height	= cssH($P, newCenter.height);
                        s.maxHeight	= CSS.height;
                        hasRoom		= (s.maxHeight >= 0); // ALWAYS TRUE NOW
                        if (!hasRoom) s.noVerticalRoom = true; // makePaneFit() logic
                    }

                    if (hasRoom) {
                        // resizeAll passes skipCallback because it triggers callbacks after ALL panes are resized
                        if (!skipCallback && state.initialized)
                            _runCallbacks("onresize_start", pane);

                        $P.css(CSS); // apply the CSS to pane
                        if (pane !== "center")
                            sizeHandles(pane); // also update resizer length
                        if (s.noRoom && !s.isClosed && !s.isHidden)
                            makePaneFit(pane); // will re-open/show auto-closed/hidden pane
                        if (s.isVisible) {
                            $.extend(s, elDims($P)); // update pane dimensions
                            if (state.initialized) sizeContent(pane); // also resize the contents, if exists
                        }
                    }
                    else if (!s.noRoom && s.isVisible) // no room for pane
                        makePaneFit(pane); // will hide or close pane

                    // reset visibility, if necessary
                    $P.css(visCSS);

                    delete s.newSize;
                    delete s.newWidth;
                    delete s.newHeight;

                    if (!s.isVisible)
                        return true; // DONE - next pane

                    /*
                     * Extra CSS for IE6 or IE7 in Quirks-mode - add 'width' to NORTH/SOUTH panes
                     * Normally these panes have only 'left' & 'right' positions so pane auto-sizes
                     * ALSO required when pane is an IFRAME because will NOT default to 'full width'
                     *	TODO: Can I use width:100% for a north/south iframe?
                     *	TODO: Sounds like a job for $P.outerWidth( sC.innerWidth ) SETTER METHOD
                     */
                    if (pane === "center") { // finished processing midPanes
                        var fix = browser.isIE6 || !browser.boxModel;
                        if ($Ps.north && (fix || state.north.tagName=="IFRAME"))
                            $Ps.north.css("width", cssW($Ps.north, sC.innerWidth));
                        if ($Ps.south && (fix || state.south.tagName=="IFRAME"))
                            $Ps.south.css("width", cssW($Ps.south, sC.innerWidth));
                    }

                    // resizeAll passes skipCallback because it triggers callbacks after ALL panes are resized
                    if (!skipCallback && state.initialized)
                        _runCallbacks("onresize_end", pane);
                });
            }


        /**
         * @see  window.onresize(), callbacks or custom code
         * @param {(Object|boolean)=}	evt_or_refresh	If 'true', then also reset pane-positioning
         */
            ,	resizeAll = function (evt_or_refresh) {
                var	oldW	= sC.innerWidth
                    ,	oldH	= sC.innerHeight
                    ;
                // stopPropagation if called by trigger("layoutdestroy") - use evtPane utility 
                evtPane(evt_or_refresh);

                // cannot size layout when 'container' is hidden or collapsed
                if (!$N.is(":visible")) return;

                if (!state.initialized) {
                    _initLayoutElements();
                    return; // no need to resize since we just initialized!
                }

                if (evt_or_refresh === true && $.isPlainObject(options.outset)) {
                    // update container CSS in case outset option has changed
                    $N.css( options.outset );
                }
                // UPDATE container dimensions
                $.extend(sC, elDims( $N, options.inset ));
                if (!sC.outerHeight) return;

                // if 'true' passed, refresh pane & handle positioning too
                if (evt_or_refresh === true) {
                    setPanePosition();
                }

                // onresizeall_start will CANCEL resizing if returns false
                // status.container has already been set, so user can access this info for calcuations
                if (false === _runCallbacks("onresizeall_start")) return false;

                var	// see if container is now 'smaller' than before
                    shrunkH	= (sC.innerHeight < oldH)
                    ,	shrunkW	= (sC.innerWidth < oldW)
                    ,	$P, o, s
                    ;
                // NOTE special order for sizing: S-N-E-W
                $.each(["south","north","east","west"], function (i, pane) {
                    if (!$Ps[pane]) return; // no pane - SKIP
                    o = options[pane];
                    s = state[pane];
                    if (s.autoResize && s.size != o.size) // resize pane to original size set in options
                        sizePane(pane, o.size, true, true, true); // true=skipCallback/noAnimation/forceResize
                    else {
                        setSizeLimits(pane);
                        makePaneFit(pane, false, true, true); // true=skipCallback/forceResize
                    }
                });

                sizeMidPanes("", true, true); // true=skipCallback/forceResize
                sizeHandles(); // reposition the toggler elements

                // trigger all individual pane callbacks AFTER layout has finished resizing
                $.each(_c.allPanes, function (i, pane) {
                    $P = $Ps[pane];
                    if (!$P) return; // SKIP
                    if (state[pane].isVisible) // undefined for non-existent panes
                        _runCallbacks("onresize_end", pane); // callback - if exists
                });

                _runCallbacks("onresizeall_end");
                //_triggerLayoutEvent(pane, 'resizeall');
            }

        /**
         * Whenever a pane resizes or opens that has a nested layout, trigger resizeAll
         *
         * @param {(string|Object)}	evt_or_pane		The pane just resized or opened
         */
            ,	resizeChildren = function (evt_or_pane, skipRefresh) {
                var	pane = evtPane.call(this, evt_or_pane);

                if (!options[pane].resizeChildren) return;

                // ensure the pane-children are up-to-date
                if (!skipRefresh) refreshChildren( pane );
                var pC = children[pane];
                if ($.isPlainObject( pC )) {
                    // resize one or more children
                    $.each( pC, function (key, child) {
                        if (!child.destroyed) child.resizeAll();
                    });
                }
            }

        /**
         * IF pane has a content-div, then resize all elements inside pane to fit pane-height
         *
         * @param {(string|Object)}	evt_or_panes		The pane(s) being resized
         * @param {boolean=}			[remeasure=false]	Should the content (header/footer) be remeasured?
         */
            ,	sizeContent = function (evt_or_panes, remeasure) {
                if (!isInitialized()) return;

                var panes = evtPane.call(this, evt_or_panes);
                panes = panes ? panes.split(",") : _c.allPanes;

                $.each(panes, function (idx, pane) {
                    var
                        $P	= $Ps[pane]
                        ,	$C	= $Cs[pane]
                        ,	o	= options[pane]
                        ,	s	= state[pane]
                        ,	m	= s.content // m = measurements
                        ;
                    if (!$P || !$C || !$P.is(":visible")) return true; // NOT VISIBLE - skip

                    // if content-element was REMOVED, update OR remove the pointer
                    if (!$C.length) {
                        initContent(pane, false);	// false = do NOT sizeContent() - already there!
                        if (!$C) return;			// no replacement element found - pointer have been removed
                    }

                    // onsizecontent_start will CANCEL resizing if returns false
                    if (false === _runCallbacks("onsizecontent_start", pane)) return;

                    // skip re-measuring offsets if live-resizing
                    if ((!s.isMoving && !s.isResizing) || o.liveContentResizing || remeasure || m.top == undefined) {
                        _measure();
                        // if any footers are below pane-bottom, they may not measure correctly,
                        // so allow pane overflow and re-measure
                        if (m.hiddenFooters > 0 && $P.css("overflow") === "hidden") {
                            $P.css("overflow", "visible");
                            _measure(); // remeasure while overflowing
                            $P.css("overflow", "hidden");
                        }
                    }
                    // NOTE: spaceAbove/Below *includes* the pane paddingTop/Bottom, but not pane.borders
                    var newH = s.innerHeight - (m.spaceAbove - s.css.paddingTop) - (m.spaceBelow - s.css.paddingBottom);

                    if (!$C.is(":visible") || m.height != newH) {
                        // size the Content element to fit new pane-size - will autoHide if not enough room
                        setOuterHeight($C, newH, true); // true=autoHide
                        m.height = newH; // save new height
                    };

                    if (state.initialized)
                        _runCallbacks("onsizecontent_end", pane);

                    function _below ($E) {
                        return max(s.css.paddingBottom, (parseInt($E.css("marginBottom"), 10) || 0));
                    };

                    function _measure () {
                        var
                            ignore	= options[pane].contentIgnoreSelector
                            ,	$Fs		= $C.nextAll().not(".ui-layout-mask").not(ignore || ":lt(0)") // not :lt(0) = ALL
                            ,	$Fs_vis	= $Fs.filter(':visible')
                            ,	$F		= $Fs_vis.filter(':last')
                            ;
                        m = {
                            top:			$C[0].offsetTop
                            ,	height:			$C.outerHeight()
                            ,	numFooters:		$Fs.length
                            ,	hiddenFooters:	$Fs.length - $Fs_vis.length
                            ,	spaceBelow:		0 // correct if no content footer ($E)
                        }
                        m.spaceAbove	= m.top; // just for status - not used in calc
                        m.bottom		= m.top + m.height;
                        if ($F.length)
                        //spaceBelow = (LastFooter.top + LastFooter.height) [footerBottom] - Content.bottom + max(LastFooter.marginBottom, pane.paddingBotom)
                            m.spaceBelow = ($F[0].offsetTop + $F.outerHeight()) - m.bottom + _below($F);
                        else // no footer - check marginBottom on Content element itself
                            m.spaceBelow = _below($C);
                    };
                });
            }


        /**
         * Called every time a pane is opened, closed, or resized to slide the togglers to 'center' and adjust their length if necessary
         *
         * @see  initHandles(), open(), close(), resizeAll()
         * @param {(string|Object)=}		evt_or_panes	The pane(s) being resized
         */
            ,	sizeHandles = function (evt_or_panes) {
                var panes = evtPane.call(this, evt_or_panes)
                panes = panes ? panes.split(",") : _c.borderPanes;

                $.each(panes, function (i, pane) {
                    var
                        o	= options[pane]
                        ,	s	= state[pane]
                        ,	$P	= $Ps[pane]
                        ,	$R	= $Rs[pane]
                        ,	$T	= $Ts[pane]
                        ,	$TC
                        ;
                    if (!$P || !$R) return;

                    var
                        dir			= _c[pane].dir
                        ,	_state		= (s.isClosed ? "_closed" : "_open")
                        ,	spacing		= o["spacing"+ _state]
                        ,	togAlign	= o["togglerAlign"+ _state]
                        ,	togLen		= o["togglerLength"+ _state]
                        ,	paneLen
                        ,	left
                        ,	offset
                        ,	CSS = {}
                        ;

                    if (spacing === 0) {
                        $R.hide();
                        return;
                    }
                    else if (!s.noRoom && !s.isHidden) // skip if resizer was hidden for any reason
                        $R.show(); // in case was previously hidden

                    // Resizer Bar is ALWAYS same width/height of pane it is attached to
                    if (dir === "horz") { // north/south
                        //paneLen = $P.outerWidth(); // s.outerWidth || 
                        paneLen = sC.innerWidth; // handle offscreen-panes
                        s.resizerLength = paneLen;
                        left = $.layout.cssNum($P, "left")
                        $R.css({
                            width:	cssW($R, paneLen) // account for borders & padding
                            ,	height:	cssH($R, spacing) // ditto
                            ,	left:	left > -9999 ? left : sC.inset.left // handle offscreen-panes
                        });
                    }
                    else { // east/west
                        paneLen = $P.outerHeight(); // s.outerHeight || 
                        s.resizerLength = paneLen;
                        $R.css({
                            height:	cssH($R, paneLen) // account for borders & padding
                            ,	width:	cssW($R, spacing) // ditto
                            ,	top:	sC.inset.top + getPaneSize("north", true) // TODO: what if no North pane?
                            //,	top:	$.layout.cssNum($Ps["center"], "top")
                        });
                    }

                    // remove hover classes
                    removeHover( o, $R );

                    if ($T) {
                        if (togLen === 0 || (s.isSliding && o.hideTogglerOnSlide)) {
                            $T.hide(); // always HIDE the toggler when 'sliding'
                            return;
                        }
                        else
                            $T.show(); // in case was previously hidden

                        if (!(togLen > 0) || togLen === "100%" || togLen > paneLen) {
                            togLen = paneLen;
                            offset = 0;
                        }
                        else { // calculate 'offset' based on options.PANE.togglerAlign_open/closed
                            if (isStr(togAlign)) {
                                switch (togAlign) {
                                    case "top":
                                    case "left":	offset = 0;
                                        break;
                                    case "bottom":
                                    case "right":	offset = paneLen - togLen;
                                        break;
                                    case "middle":
                                    case "center":
                                    default:		offset = round((paneLen - togLen) / 2); // 'default' catches typos
                                }
                            }
                            else { // togAlign = number
                                var x = parseInt(togAlign, 10); //
                                if (togAlign >= 0) offset = x;
                                else offset = paneLen - togLen + x; // NOTE: x is negative!
                            }
                        }

                        if (dir === "horz") { // north/south
                            var width = cssW($T, togLen);
                            $T.css({
                                width:	width  // account for borders & padding
                                ,	height:	cssH($T, spacing) // ditto
                                ,	left:	offset // TODO: VERIFY that toggler  positions correctly for ALL values
                                ,	top:	0
                            });
                            // CENTER the toggler content SPAN
                            $T.children(".content").each(function(){
                                $TC = $(this);
                                $TC.css("marginLeft", round((width-$TC.outerWidth())/2)); // could be negative
                            });
                        }
                        else { // east/west
                            var height = cssH($T, togLen);
                            $T.css({
                                height:	height // account for borders & padding
                                ,	width:	cssW($T, spacing) // ditto
                                ,	top:	offset // POSITION the toggler
                                ,	left:	0
                            });
                            // CENTER the toggler content SPAN
                            $T.children(".content").each(function(){
                                $TC = $(this);
                                $TC.css("marginTop", round((height-$TC.outerHeight())/2)); // could be negative
                            });
                        }

                        // remove ALL hover classes
                        removeHover( 0, $T );
                    }

                    // DONE measuring and sizing this resizer/toggler, so can be 'hidden' now
                    if (!state.initialized && (o.initHidden || s.isHidden)) {
                        $R.hide();
                        if ($T) $T.hide();
                    }
                });
            }


        /**
         * @param {(string|Object)}	evt_or_pane
         */
            ,	enableClosable = function (evt_or_pane) {
                if (!isInitialized()) return;
                var	pane = evtPane.call(this, evt_or_pane)
                    ,	$T	= $Ts[pane]
                    ,	o	= options[pane]
                    ;
                if (!$T) return;
                o.closable = true;
                $T	.bind("click."+ sID, function(evt){ evt.stopPropagation(); toggle(pane); })
                    .css("visibility", "visible")
                    .css("cursor", "pointer")
                    .attr("title", state[pane].isClosed ? o.tips.Open : o.tips.Close) // may be blank
                    .show();
            }
        /**
         * @param {(string|Object)}	evt_or_pane
         * @param {boolean=}			[hide=false]
         */
            ,	disableClosable = function (evt_or_pane, hide) {
                if (!isInitialized()) return;
                var	pane = evtPane.call(this, evt_or_pane)
                    ,	$T	= $Ts[pane]
                    ;
                if (!$T) return;
                options[pane].closable = false;
                // is closable is disable, then pane MUST be open!
                if (state[pane].isClosed) open(pane, false, true);
                $T	.unbind("."+ sID)
                    .css("visibility", hide ? "hidden" : "visible") // instead of hide(), which creates logic issues
                    .css("cursor", "default")
                    .attr("title", "");
            }


        /**
         * @param {(string|Object)}	evt_or_pane
         */
            ,	enableSlidable = function (evt_or_pane) {
                if (!isInitialized()) return;
                var	pane = evtPane.call(this, evt_or_pane)
                    ,	$R	= $Rs[pane]
                    ;
                if (!$R || !$R.data('draggable')) return;
                options[pane].slidable = true;
                if (state[pane].isClosed)
                    bindStartSlidingEvents(pane, true);
            }
        /**
         * @param {(string|Object)}	evt_or_pane
         */
            ,	disableSlidable = function (evt_or_pane) {
                if (!isInitialized()) return;
                var	pane = evtPane.call(this, evt_or_pane)
                    ,	$R	= $Rs[pane]
                    ;
                if (!$R) return;
                options[pane].slidable = false;
                if (state[pane].isSliding)
                    close(pane, false, true);
                else {
                    bindStartSlidingEvents(pane, false);
                    $R	.css("cursor", "default")
                        .attr("title", "");
                    removeHover(null, $R[0]); // in case currently hovered
                }
            }


        /**
         * @param {(string|Object)}	evt_or_pane
         */
            ,	enableResizable = function (evt_or_pane) {
                if (!isInitialized()) return;
                var	pane = evtPane.call(this, evt_or_pane)
                    ,	$R	= $Rs[pane]
                    ,	o	= options[pane]
                    ;
                if (!$R || !$R.data('draggable')) return;
                o.resizable = true;
                $R.draggable("enable");
                if (!state[pane].isClosed)
                    $R	.css("cursor", o.resizerCursor)
                        .attr("title", o.tips.Resize);
            }
        /**
         * @param {(string|Object)}	evt_or_pane
         */
            ,	disableResizable = function (evt_or_pane) {
                if (!isInitialized()) return;
                var	pane = evtPane.call(this, evt_or_pane)
                    ,	$R	= $Rs[pane]
                    ;
                if (!$R || !$R.data('draggable')) return;
                options[pane].resizable = false;
                $R	.draggable("disable")
                    .css("cursor", "default")
                    .attr("title", "");
                removeHover(null, $R[0]); // in case currently hovered
            }


        /**
         * Move a pane from source-side (eg, west) to target-side (eg, east)
         * If pane exists on target-side, sample that to source-side, ie, 'swap' the panes
         *
         * @param {(string|Object)}	evt_or_pane1	The pane/edge being swapped
         * @param {string}			pane2			ditto
         */
            ,	swapPanes = function (evt_or_pane1, pane2) {
                if (!isInitialized()) return;
                var pane1 = evtPane.call(this, evt_or_pane1);
                // change status.edge NOW so callbacks can know where pane is headed...
                state[pane1].edge = pane2;
                state[pane2].edge = pane1;
                // run these even if NOT status.initialized
                if (false === _runCallbacks("onswap_start", pane1)
                    ||	false === _runCallbacks("onswap_start", pane2)
                    ) {
                    state[pane1].edge = pane1; // reset
                    state[pane2].edge = pane2;
                    return;
                }

                var
                    oPane1	= copy( pane1 )
                    ,	oPane2	= copy( pane2 )
                    ,	sizes	= {}
                    ;
                sizes[pane1] = oPane1 ? oPane1.state.size : 0;
                sizes[pane2] = oPane2 ? oPane2.state.size : 0;

                // clear pointers & status
                $Ps[pane1] = false;
                $Ps[pane2] = false;
                state[pane1] = {};
                state[pane2] = {};

                // ALWAYS remove the resizer & toggler elements
                if ($Ts[pane1]) $Ts[pane1].remove();
                if ($Ts[pane2]) $Ts[pane2].remove();
                if ($Rs[pane1]) $Rs[pane1].remove();
                if ($Rs[pane2]) $Rs[pane2].remove();
                $Rs[pane1] = $Rs[pane2] = $Ts[pane1] = $Ts[pane2] = false;

                // transfer element pointers and data to NEW Layout keys
                move( oPane1, pane2 );
                move( oPane2, pane1 );

                // cleanup objects
                oPane1 = oPane2 = sizes = null;

                // make panes 'visible' again
                if ($Ps[pane1]) $Ps[pane1].css(_c.visible);
                if ($Ps[pane2]) $Ps[pane2].css(_c.visible);

                // fix any size discrepancies caused by swap
                resizeAll();

                // run these even if NOT status.initialized
                _runCallbacks("onswap_end", pane1);
                _runCallbacks("onswap_end", pane2);

                return;

                function copy (n) { // n = pane
                    var
                        $P	= $Ps[n]
                        ,	$C	= $Cs[n]
                        ;
                    return !$P ? false : {
                        pane:		n
                        ,	P:			$P ? $P[0] : false
                        ,	C:			$C ? $C[0] : false
                        ,	state:		$.extend(true, {}, state[n])
                        ,	options:	$.extend(true, {}, options[n])
                    }
                };

                function move (oPane, pane) {
                    if (!oPane) return;
                    var
                        P		= oPane.P
                        ,	C		= oPane.C
                        ,	oldPane = oPane.pane
                        ,	c		= _c[pane]
                    //	save pane-options that should be retained
                        ,	s		= $.extend(true, {}, state[pane])
                        ,	o		= options[pane]
                    //	RETAIN side-specific FX Settings - more below
                        ,	fx		= { resizerCursor: o.resizerCursor }
                        ,	re, size, pos
                        ;
                    $.each("fxName,fxSpeed,fxSettings".split(","), function (i, k) {
                        fx[k +"_open"]  = o[k +"_open"];
                        fx[k +"_close"] = o[k +"_close"];
                        fx[k +"_size"]  = o[k +"_size"];
                    });

                    // update object pointers and attributes
                    $Ps[pane] = $(P)
                        .data({
                            layoutPane:		Instance[pane]	// NEW pointer to pane-alias-object
                            ,	layoutEdge:		pane
                        })
                        .css(_c.hidden)
                        .css(c.cssReq)
                    ;
                    $Cs[pane] = C ? $(C) : false;

                    // set options and status
                    options[pane]	= $.extend(true, {}, oPane.options, fx);
                    state[pane]		= $.extend(true, {}, oPane.state);

                    // change classNames on the pane, eg: ui-layout-pane-east ==> ui-layout-pane-west
                    re = new RegExp(o.paneClass +"-"+ oldPane, "g");
                    P.className = P.className.replace(re, o.paneClass +"-"+ pane);

                    // ALWAYS regenerate the resizer & toggler elements
                    initHandles(pane); // create the required resizer & toggler

                    // if moving to different orientation, then keep 'target' pane size
                    if (c.dir != _c[oldPane].dir) {
                        size = sizes[pane] || 0;
                        setSizeLimits(pane); // update pane-status
                        size = max(size, state[pane].minSize);
                        // use manualSizePane to disable autoResize - not useful after panes are swapped
                        manualSizePane(pane, size, true, true); // true/true = skipCallback/noAnimation
                    }
                    else // sample the resizer here
                        $Rs[pane].css(c.side, sC.inset[c.side] + (state[pane].isVisible ? getPaneSize(pane) : 0));


                    // ADD CLASSNAMES & SLIDE-BINDINGS
                    if (oPane.state.isVisible && !s.isVisible)
                        setAsOpen(pane, true); // true = skipCallback
                    else {
                        setAsClosed(pane);
                        bindStartSlidingEvents(pane, true); // will enable events IF option is set
                    }

                    // DESTROY the object
                    oPane = null;
                };
            }


        /**
         * INTERNAL method to sync pin-buttons when pane is opened or closed
         * Unpinned means the pane is 'sliding' - ie, over-top of the adjacent panes
         *
         * @see  open(), setAsOpen(), setAsClosed()
         * @param {string}	pane   These are the params returned to callbacks by layout()
         * @param {boolean}	doPin  True means set the pin 'down', False means 'up'
         */
            ,	syncPinBtns = function (pane, doPin) {
                if ($.layout.plugins.buttons)
                    $.each(state[pane].pins, function (i, selector) {
                        $.layout.buttons.setPinState(Instance, $(selector), pane, doPin);
                    });
            }

            ;	// END var DECLARATIONS

        /**
         * Capture keys when enableCursorHotkey - toggle pane if hotkey pressed
         *
         * @see  document.keydown()
         */
        function keyDown (evt) {
            if (!evt) return true;
            var code = evt.keyCode;
            if (code < 33) return true; // ignore special keys: ENTER, TAB, etc

            var
                PANE = {
                    38: "north" // Up Cursor	- $.ui.keyCode.UP
                    ,	40: "south" // Down Cursor	- $.ui.keyCode.DOWN
                    ,	37: "west"  // Left Cursor	- $.ui.keyCode.LEFT
                    ,	39: "east"  // Right Cursor	- $.ui.keyCode.RIGHT
                }
                ,	ALT		= evt.altKey // no worky!
                ,	SHIFT	= evt.shiftKey
                ,	CTRL	= evt.ctrlKey
                ,	CURSOR	= (CTRL && code >= 37 && code <= 40)
                ,	o, k, m, pane
                ;

            if (CURSOR && options[PANE[code]].enableCursorHotkey) // valid cursor-hotkey
                pane = PANE[code];
            else if (CTRL || SHIFT) // check to see if this matches a custom-hotkey
                $.each(_c.borderPanes, function (i, p) { // loop each pane to check its hotkey
                    o = options[p];
                    k = o.customHotkey;
                    m = o.customHotkeyModifier; // if missing or invalid, treated as "CTRL+SHIFT"
                    if ((SHIFT && m=="SHIFT") || (CTRL && m=="CTRL") || (CTRL && SHIFT)) { // Modifier matches
                        if (k && code === (isNaN(k) || k <= 9 ? k.toUpperCase().charCodeAt(0) : k)) { // Key matches
                            pane = p;
                            return false; // BREAK
                        }
                    }
                });

            // validate pane
            if (!pane || !$Ps[pane] || !options[pane].closable || state[pane].isHidden)
                return true;

            toggle(pane);

            evt.stopPropagation();
            evt.returnValue = false; // CANCEL key
            return false;
        };


        /*
         * ######################################
         *	UTILITY METHODS
         *	called externally or by initButtons
         * ######################################
         */

        /**
         * Change/reset a pane overflow setting & zIndex to allow popups/drop-downs to work
         *
         * @param {Object=}   [el]	(optional) Can also be 'bound' to a click, mouseOver, or other event
         */
        function allowOverflow (el) {
            if (!isInitialized()) return;
            if (this && this.tagName) el = this; // BOUND to element
            var $P;
            if (isStr(el))
                $P = $Ps[el];
            else if ($(el).data("layoutRole"))
                $P = $(el);
            else
                $(el).parents().each(function(){
                    if ($(this).data("layoutRole")) {
                        $P = $(this);
                        return false; // BREAK
                    }
                });
            if (!$P || !$P.length) return; // INVALID

            var
                pane	= $P.data("layoutEdge")
                ,	s		= state[pane]
                ;

            // if pane is already raised, then reset it before doing it again!
            // this would happen if allowOverflow is attached to BOTH the pane and an element 
            if (s.cssSaved)
                resetOverflow(pane); // reset previous CSS before continuing

            // if pane is raised by sliding or resizing, or its closed, then abort
            if (s.isSliding || s.isResizing || s.isClosed) {
                s.cssSaved = false;
                return;
            }

            var
                newCSS	= { zIndex: (options.zIndexes.resizer_normal + 1) }
                ,	curCSS	= {}
                ,	of		= $P.css("overflow")
                ,	ofX		= $P.css("overflowX")
                ,	ofY		= $P.css("overflowY")
                ;
            // determine which, if any, overflow settings need to be changed
            if (of != "visible") {
                curCSS.overflow = of;
                newCSS.overflow = "visible";
            }
            if (ofX && !ofX.match(/(visible|auto)/)) {
                curCSS.overflowX = ofX;
                newCSS.overflowX = "visible";
            }
            if (ofY && !ofY.match(/(visible|auto)/)) {
                curCSS.overflowY = ofX;
                newCSS.overflowY = "visible";
            }

            // save the current overflow settings - even if blank!
            s.cssSaved = curCSS;

            // apply new CSS to raise zIndex and, if necessary, make overflow 'visible'
            $P.css( newCSS );

            // make sure the zIndex of all other panes is normal
            $.each(_c.allPanes, function(i, p) {
                if (p != pane) resetOverflow(p);
            });

        };
        /**
         * @param {Object=}   [el]	(optional) Can also be 'bound' to a click, mouseOver, or other event
         */
        function resetOverflow (el) {
            if (!isInitialized()) return;
            if (this && this.tagName) el = this; // BOUND to element
            var $P;
            if (isStr(el))
                $P = $Ps[el];
            else if ($(el).data("layoutRole"))
                $P = $(el);
            else
                $(el).parents().each(function(){
                    if ($(this).data("layoutRole")) {
                        $P = $(this);
                        return false; // BREAK
                    }
                });
            if (!$P || !$P.length) return; // INVALID

            var
                pane	= $P.data("layoutEdge")
                ,	s		= state[pane]
                ,	CSS		= s.cssSaved || {}
                ;
            // reset the zIndex
            if (!s.isSliding && !s.isResizing)
                $P.css("zIndex", options.zIndexes.pane_normal);

            // reset Overflow - if necessary
            $P.css( CSS );

            // clear var
            s.cssSaved = false;
        };

        /*
         * #####################
         * CREATE/RETURN LAYOUT
         * #####################
         */

        // validate that container exists
        var $N = $(this).eq(0); // FIRST matching Container element
        if (!$N.length) {
            return _log( options.errors.containerMissing );
        };

        // Users retrieve Instance of a layout with: $N.layout() OR $N.data("layout")
        // return the Instance-pointer if layout has already been initialized
        if ($N.data("layoutContainer") && $N.data("layout"))
            return $N.data("layout"); // cached pointer

        // init global vars
        var
            $Ps	= {}	// Panes x5		- set in initPanes()
            ,	$Cs	= {}	// Content x5	- set in initPanes()
            ,	$Rs	= {}	// Resizers x4	- set in initHandles()
            ,	$Ts	= {}	// Togglers x4	- set in initHandles()
            ,	$Ms	= $([])	// Masks - up to 2 masks per pane (IFRAME + DIV)
        //	aliases for code brevity
            ,	sC	= state.container // alias for easy access to 'container dimensions'
            ,	sID	= state.id // alias for unique layout ID/namespace - eg: "layout435"
            ;

        // create Instance object to expose data & option Properties, and primary action Methods
        var Instance = {
            //	layout data
            options:			options			// property - options hash
            ,	state:				state			// property - dimensions hash
            //	object pointers
            ,	container:			$N				// property - object pointers for layout container
            ,	panes:				$Ps				// property - object pointers for ALL Panes: panes.north, panes.center
            ,	contents:			$Cs				// property - object pointers for ALL Content: contents.north, contents.center
            ,	resizers:			$Rs				// property - object pointers for ALL Resizers, eg: resizers.north
            ,	togglers:			$Ts				// property - object pointers for ALL Togglers, eg: togglers.north
            //	border-pane open/close
            ,	hide:				hide			// method - ditto
            ,	show:				show			// method - ditto
            ,	toggle:				toggle			// method - pass a 'pane' ("north", "west", etc)
            ,	open:				open			// method - ditto
            ,	close:				close			// method - ditto
            ,	slideOpen:			slideOpen		// method - ditto
            ,	slideClose:			slideClose		// method - ditto
            ,	slideToggle:		slideToggle		// method - ditto
            //	pane actions
            ,	setSizeLimits:		setSizeLimits	// method - pass a 'pane' - update status min/max data
            ,	_sizePane:			sizePane		// method -intended for user by plugins only!
            ,	sizePane:			manualSizePane	// method - pass a 'pane' AND an 'outer-size' in pixels or percent, or 'auto'
            ,	sizeContent:		sizeContent		// method - pass a 'pane'
            ,	swapPanes:			swapPanes		// method - pass TWO 'panes' - will swap them
            ,	showMasks:			showMasks		// method - pass a 'pane' OR list of panes - default = all panes with mask option set
            ,	hideMasks:			hideMasks		// method - ditto'
            //	pane element methods
            ,	initContent:		initContent		// method - ditto
            ,	addPane:			addPane			// method - pass a 'pane'
            ,	removePane:			removePane		// method - pass a 'pane' to remove from layout, add 'true' to delete the pane-elem
            ,	createChildren:		createChildren	// method - pass a 'pane' and (optional) layout-options (OVERRIDES options[pane].children
            ,	refreshChildren:	refreshChildren	// method - pass a 'pane' and a layout-instance
            //	special pane option setting
            ,	enableClosable:		enableClosable	// method - pass a 'pane'
            ,	disableClosable:	disableClosable	// method - ditto
            ,	enableSlidable:		enableSlidable	// method - ditto
            ,	disableSlidable:	disableSlidable	// method - ditto
            ,	enableResizable:	enableResizable	// method - ditto
            ,	disableResizable:	disableResizable// method - ditto
            //	utility methods for panes
            ,	allowOverflow:		allowOverflow	// utility - pass calling element (this)
            ,	resetOverflow:		resetOverflow	// utility - ditto
            //	layout control
            ,	destroy:			destroy			// method - no parameters
            ,	initPanes:			isInitialized	// method - no parameters
            ,	resizeAll:			resizeAll		// method - no parameters
            //	callback triggering
            ,	runCallbacks:		_runCallbacks	// method - pass evtName & pane (if a pane-event), eg: trigger("onopen", "west")
            //	alias collections of options, status and children - created in addPane and extended elsewhere
            ,	hasParentLayout:	false			// set by initContainer()
            ,	children:			children		// pointers to child-layouts, eg: Instance.children.west.layoutName
            ,	north:				false			// alias group: { name: pane, pane: $Ps[pane], options: options[pane], status: status[pane], children: children[pane] }
            ,	south:				false			// ditto
            ,	west:				false			// ditto
            ,	east:				false			// ditto
            ,	center:				false			// ditto
        };

        // create the border layout NOW
        if (_create() === 'cancel') // onload_start callback returned false to CANCEL layout creation
            return null;
        else // true OR false -- if layout-elements did NOT init (hidden or do not exist), can auto-init later
            return Instance; // return the Instance object

    }


})( jQuery );
// END Layout - keep internal vars internal!



// START Plugins - shared wrapper, no global vars
(function ($) {


    /**
     * jquery.layout.status 1.0
     * $Date: 2011-07-16 08:00:00 (Sat, 16 July 2011) $
     *
     * Copyright (c) 2012
     *   Kevin Dalman (http://allpro.net)
     *
     * Dual licensed under the GPL (http://www.gnu.org/licenses/gpl.html)
     * and MIT (http://www.opensource.org/licenses/mit-license.php) licenses.
     *
     * @requires: UI Layout 1.3.0.rc30.1 or higher
     * @requires: $.ui.cookie (above)
     *
     * @see: http://groups.google.com/group/jquery-ui-layout
     */
    /*
     *	State-management options stored in options.stateManagement, which includes a .cookie hash
     *	Default options saves ALL KEYS for ALL PANES, ie: pane.size, pane.isClosed, pane.isHidden
     *
     *	// STATE/COOKIE OPTIONS
     *	@example $(el).layout({
     stateManagement: {
     enabled:	true
     ,	stateKeys:	"east.size,west.size,east.isClosed,west.isClosed"
     ,	cookie:		{ name: "appLayout", path: "/" }
     }
     })
     *	@example $(el).layout({ stateManagement__enabled: true }) // enable auto-status-management using cookies
     *	@example $(el).layout({ stateManagement__cookie: { name: "appLayout", path: "/" } })
     *	@example $(el).layout({ stateManagement__cookie__name: "appLayout", stateManagement__cookie__path: "/" })
     *
     *	// STATE/COOKIE METHODS
     *	@example myLayout.saveCookie( "west.isClosed,north.size,south.isHidden", {expires: 7} );
     *	@example myLayout.loadCookie();
     *	@example myLayout.deleteCookie();
     *	@example var JSON = myLayout.readState();	// CURRENT Layout State
     *	@example var JSON = myLayout.readCookie();	// SAVED Layout State (from cookie)
     *	@example var JSON = myLayout.status.stateData;	// LAST LOADED Layout State (cookie saved in layout.status hash)
     *
     *	CUSTOM STATE-MANAGEMENT (eg, saved in a database)
     *	@example var JSON = myLayout.readState( "west.isClosed,north.size,south.isHidden" );
     *	@example myLayout.loadState( JSON );
     */

    /**
     *	UI COOKIE UTILITY
     *
     *	A $.cookie OR $.ui.cookie namespace *should be standard*, but until then...
     *	This creates $.ui.cookie so Layout does not need the cookie.jquery.js plugin
     *	NOTE: This utility is REQUIRED by the layout.status plugin
     *
     *	Cookie methods in Layout are created as part of State Management
     */
    if (!$.ui) $.ui = {};
    $.ui.cookie = {

        // cookieEnabled is not in DOM specs, but DOES works in all browsers,including IE6
        acceptsCookies: !!navigator.cookieEnabled

        ,	read: function (name) {
            var	c		= document.cookie
                ,	cs		= c ? c.split(';') : []
                ,	pair	// loop var
                ;
            for (var i=0, n=cs.length; i < n; i++) {
                pair = $.trim(cs[i]).split('='); // name=value pair
                if (pair[0] == name) // found the layout cookie
                    return decodeURIComponent(pair[1]);
            }
            return null;
        }

        ,	write: function (name, val, cookieOpts) {
            var	params	= ""
                ,	date	= ""
                ,	clear	= false
                ,	o		= cookieOpts || {}
                ,	x		= o.expires  || null
                ,	t		= $.type(x)
                ;
            if (t === "date")
                date = x;
            else if (t === "string" && x > 0) {
                x = parseInt(x,10);
                t = "number";
            }
            if (t === "number") {
                date = new Date();
                if (x > 0)
                    date.setDate(date.getDate() + x);
                else {
                    date.setFullYear(1970);
                    clear = true;
                }
            }
            if (date)		params += ";expires="+ date.toUTCString();
            if (o.path)		params += ";path="+ o.path;
            if (o.domain)	params += ";domain="+ o.domain;
            if (o.secure)	params += ";secure";
            document.cookie = name +"="+ (clear ? "" : encodeURIComponent( val )) + params; // write or clear cookie
        }

        ,	clear: function (name) {
            $.ui.cookie.write(name, "", {expires: -1});
        }

    };
// if cookie.jquery.js is not loaded, create an alias to replicate it
// this may be useful to other plugins or code dependent on that plugin
    if (!$.cookie) $.cookie = function (k, v, o) {
        var C = $.ui.cookie;
        if (v === null)
            C.clear(k);
        else if (v === undefined)
            return C.read(k);
        else
            C.write(k, v, o);
    };


// tell Layout that the status plugin is available
    $.layout.plugins.stateManagement = true;

//	Add State-Management options to layout.defaults
    $.layout.config.optionRootKeys.push("stateManagement");
    $.layout.defaults.stateManagement = {
        enabled:		false	// true = enable status-management, even if not using cookies
        ,	autoSave:		true	// Save a status-cookie when page exits?
        ,	autoLoad:		true	// Load the status-cookie when Layout inits?
        ,	animateLoad:	true	// animate panes when loading status into an active layout
        ,	includeChildren: true	// recurse into child layouts to include their status as well
        // List status-data to save - must be pane-specific
        ,	stateKeys:	"north.size,south.size,east.size,west.size,"+
            "north.isClosed,south.isClosed,east.isClosed,west.isClosed,"+
            "north.isHidden,south.isHidden,east.isHidden,west.isHidden"
        ,	cookie: {
            name:	""	// If not specified, will use Layout.name, else just "Layout"
            ,	domain:	""	// blank = current domain
            ,	path:	""	// blank = current page, "/" = entire website
            ,	expires: ""	// 'days' to keep cookie - leave blank for 'session cookie'
            ,	secure:	false
        }
    };
// Set stateManagement as a layout-option, NOT a pane-option
    $.layout.optionsMap.layout.push("stateManagement");

    /*
     *	State Management methods
     */
    $.layout.state = {

        /**
         * Get the current layout status and save it to a cookie
         *
         * myLayout.saveCookie( keys, cookieOpts )
         *
         * @param {Object}			inst
         * @param {(string|Array)=}	keys
         * @param {Object=}			cookieOpts
         */
        saveCookie: function (inst, keys, cookieOpts) {
            var o	= inst.options
                ,	sm	= o.stateManagement
                ,	oC	= $.extend(true, {}, sm.cookie, cookieOpts || null)
                ,	data = inst.state.stateData = inst.readState( keys || sm.stateKeys ) // read current panes-status
                ;
            $.ui.cookie.write( oC.name || o.name || "Layout", $.layout.state.encodeJSON(data), oC );
            return $.extend(true, {}, data); // return COPY of status.stateData data
        }

        /**
         * Remove the status cookie
         *
         * @param {Object}	inst
         */
        ,	deleteCookie: function (inst) {
            var o = inst.options;
            $.ui.cookie.clear( o.stateManagement.cookie.name || o.name || "Layout" );
        }

        /**
         * Read & return data from the cookie - as JSON
         *
         * @param {Object}	inst
         */
        ,	readCookie: function (inst) {
            var o = inst.options;
            var c = $.ui.cookie.read( o.stateManagement.cookie.name || o.name || "Layout" );
            // convert cookie string back to a hash and return it
            return c ? $.layout.state.decodeJSON(c) : {};
        }

        /**
         * Get data from the cookie and USE IT to loadState
         *
         * @param {Object}	inst
         */
        ,	loadCookie: function (inst) {
            var c = $.layout.state.readCookie(inst); // READ the cookie
            if (c) {
                inst.state.stateData = $.extend(true, {}, c); // SET status.stateData
                inst.loadState(c); // LOAD the retrieved status
            }
            return c;
        }

        /**
         * Update layout options from the cookie, if one exists
         *
         * @param {Object}		inst
         * @param {Object=}		stateData
         * @param {boolean=}	animate
         */
        ,	loadState: function (inst, data, opts) {
            if (!$.isPlainObject( data ) || $.isEmptyObject( data )) return;

            // normalize data & cache in the status object
            data = inst.state.stateData = $.layout.transformData( data ); // panes = default subkey

            // add missing/default status-restore options
            var smo = inst.options.stateManagement;
            opts = $.extend({
                animateLoad:		false //smo.animateLoad
                ,	includeChildren:	smo.includeChildren
            }, opts );

            if (!inst.state.initialized) {
                /*
                 *	layout NOT initialized, so just update its options
                 */
                // MUST remove pane.children keys before applying to options
                // use a copy so we don't remove keys from original data
                var o = $.extend(true, {}, data);
                //delete o.center; // center has no status-data - only children
                $.each($.layout.config.allPanes, function (idx, pane) {
                    if (o[pane]) delete o[pane].children;
                });
                // update CURRENT layout-options with saved status data
                $.extend(true, inst.options, o);
            }
            else {
                /*
                 *	layout already initialized, so modify layout's configuration
                 */
                var noAnimate = !opts.animateLoad
                    ,	o, c, h, state, open
                    ;
                $.each($.layout.config.borderPanes, function (idx, pane) {
                    o = data[ pane ];
                    if (!$.isPlainObject( o )) return; // no key, skip pane

                    s	= o.size;
                    c	= o.initClosed;
                    h	= o.initHidden;
                    ar	= o.autoResize
                    state	= inst.state[pane];
                    open	= state.isVisible;

                    // reset autoResize
                    if (ar)
                        state.autoResize = ar;
                    // resize BEFORE opening
                    if (!open)
                        inst._sizePane(pane, s, false, false, false); // false=skipCallback/noAnimation/forceResize
                    // open/close as necessary - DO NOT CHANGE THIS ORDER!
                    if (h === true)			inst.hide(pane, noAnimate);
                    else if (c === true)	inst.close(pane, false, noAnimate);
                    else if (c === false)	inst.open (pane, false, noAnimate);
                    else if (h === false)	inst.show (pane, false, noAnimate);
                    // resize AFTER any other actions
                    if (open)
                        inst._sizePane(pane, s, false, false, noAnimate); // animate resize if option passed
                });

                /*
                 *	RECURSE INTO CHILD-LAYOUTS
                 */
                if (opts.includeChildren) {
                    var paneStateChildren, childState;
                    $.each(inst.children, function (pane, paneChildren) {
                        paneStateChildren = data[pane] ? data[pane].children : 0;
                        if (paneStateChildren && paneChildren) {
                            $.each(paneChildren, function (stateKey, child) {
                                childState = paneStateChildren[stateKey];
                                if (child && childState)
                                    child.loadState( childState );
                            });
                        }
                    });
                }
            }
        }

        /**
         * Get the *current layout status* and return it as a hash
         *
         * @param {Object=}		inst	// Layout instance to get status for
         * @param {object=}		[opts]	// State-Managements override options
         */
        ,	readState: function (inst, opts) {
            // backward compatility
            if ($.type(opts) === 'string') opts = { keys: opts };
            if (!opts) opts = {};
            var	sm		= inst.options.stateManagement
                ,	ic		= opts.includeChildren
                ,	recurse	= ic !== undefined ? ic : sm.includeChildren
                ,	keys	= opts.stateKeys || sm.stateKeys
                ,	alt		= { isClosed: 'initClosed', isHidden: 'initHidden' }
                ,	state	= inst.state
                ,	panes	= $.layout.config.allPanes
                ,	data	= {}
                ,	pair, pane, key, val
                ,	ps, pC, child, array, count, branch
                ;
            if ($.isArray(keys)) keys = keys.join(",");
            // convert keys to an array and change delimiters from '__' to '.'
            keys = keys.replace(/__/g, ".").split(',');
            // loop keys and create a data hash
            for (var i=0, n=keys.length; i < n; i++) {
                pair = keys[i].split(".");
                pane = pair[0];
                key  = pair[1];
                if ($.inArray(pane, panes) < 0) continue; // bad pane!
                val = state[ pane ][ key ];
                if (val == undefined) continue;
                if (key=="isClosed" && state[pane]["isSliding"])
                    val = true; // if sliding, then *really* isClosed
                ( data[pane] || (data[pane]={}) )[ alt[key] ? alt[key] : key ] = val;
            }

            // recurse into the child-layouts for each pane
            if (recurse) {
                $.each(panes, function (idx, pane) {
                    pC = inst.children[pane];
                    ps = state.stateData[pane];
                    if ($.isPlainObject( pC ) && !$.isEmptyObject( pC )) {
                        // ensure a key exists for this 'pane', eg: branch = data.center
                        branch = data[pane] || (data[pane] = {});
                        if (!branch.children) branch.children = {};
                        $.each( pC, function (key, child) {
                            // ONLY read status from an initialize layout
                            if ( child.state.initialized )
                                branch.children[ key ] = $.layout.state.readState( child );
                            // if we have PREVIOUS (onLoad) status for this child-layout, KEEP IT!
                            else if ( ps && ps.children && ps.children[ key ] ) {
                                branch.children[ key ] = $.extend(true, {}, ps.children[ key ] );
                            }
                        });
                    }
                });
            }

            return data;
        }

        /**
         *	Stringify a JSON hash so can save in a cookie or db-field
         */
        ,	encodeJSON: function (JSON) {
            return parse(JSON);
            function parse (h) {
                var D=[], i=0, k, v, t // k = key, v = value
                    ,	a = $.isArray(h)
                    ;
                for (k in h) {
                    v = h[k];
                    t = typeof v;
                    if (t == 'string')		// STRING - add quotes
                        v = '"'+ v +'"';
                    else if (t == 'object')	// SUB-KEY - recurse into it
                        v = parse(v);
                    D[i++] = (!a ? '"'+ k +'":' : '') + v;
                }
                return (a ? '[' : '{') + D.join(',') + (a ? ']' : '}');
            };
        }

        /**
         *	Convert stringified JSON back to a hash object
         *	@see		$.parseJSON(), adding in jQuery 1.4.1
         */
        ,	decodeJSON: function (str) {
            try { return $.parseJSON ? $.parseJSON(str) : window["eval"]("("+ str +")") || {}; }
            catch (e) { return {}; }
        }


        ,	_create: function (inst) {
            var _	= $.layout.state
                ,	o	= inst.options
                ,	sm	= o.stateManagement
                ;
            //	ADD State-Management plugin methods to inst
            $.extend( inst, {
                //	readCookie - update options from cookie - returns hash of cookie data
                readCookie:		function () { return _.readCookie(inst); }
                //	deleteCookie
                ,	deleteCookie:	function () { _.deleteCookie(inst); }
                //	saveCookie - optionally pass keys-list and cookie-options (hash)
                ,	saveCookie:		function (keys, cookieOpts) { return _.saveCookie(inst, keys, cookieOpts); }
                //	loadCookie - readCookie and use to loadState() - returns hash of cookie data
                ,	loadCookie:		function () { return _.loadCookie(inst); }
                //	loadState - pass a hash of status to use to update options
                ,	loadState:		function (stateData, opts) { _.loadState(inst, stateData, opts); }
                //	readState - returns hash of current layout-status
                ,	readState:		function (keys) { return _.readState(inst, keys); }
                //	add JSON utility methods too...
                ,	encodeJSON:		_.encodeJSON
                ,	decodeJSON:		_.decodeJSON
            });

            // init status.stateData key, even if plugin is initially disabled
            inst.state.stateData = {};

            // autoLoad MUST BE one of: data-array, data-hash, callback-function, or TRUE
            if ( !sm.autoLoad ) return;

            //	When status-data exists in the autoLoad key USE IT,
            //	even if stateManagement.enabled == false
            if ($.isPlainObject( sm.autoLoad )) {
                if (!$.isEmptyObject( sm.autoLoad )) {
                    inst.loadState( sm.autoLoad );
                }
            }
            else if ( sm.enabled ) {
                // update the options from cookie or callback
                // if options is a function, call it to get stateData
                if ($.isFunction( sm.autoLoad )) {
                    var d = {};
                    try {
                        d = sm.autoLoad( inst, inst.state, inst.options, inst.options.name || '' ); // try to get data from fn
                    } catch (e) {}
                    if (d && $.isPlainObject( d ) && !$.isEmptyObject( d ))
                        inst.loadState(d);
                }
                else // any other truthy value will trigger loadCookie
                    inst.loadCookie();
            }
        }

        ,	_unload: function (inst) {
            var sm = inst.options.stateManagement;
            if (sm.enabled && sm.autoSave) {
                // if options is a function, call it to save the stateData
                if ($.isFunction( sm.autoSave )) {
                    try {
                        sm.autoSave( inst, inst.state, inst.options, inst.options.name || '' ); // try to get data from fn
                    } catch (e) {}
                }
                else // any truthy value will trigger saveCookie
                    inst.saveCookie();
            }
        }

    };

// add status initialization method to Layout's onCreate array of functions
    $.layout.onCreate.push( $.layout.state._create );
    $.layout.onUnload.push( $.layout.state._unload );




    /**
     * jquery.layout.buttons 1.0
     * $Date: 2011-07-16 08:00:00 (Sat, 16 July 2011) $
     *
     * Copyright (c) 2012
     *   Kevin Dalman (http://allpro.net)
     *
     * Dual licensed under the GPL (http://www.gnu.org/licenses/gpl.html)
     * and MIT (http://www.opensource.org/licenses/mit-license.php) licenses.
     *
     * @requires: UI Layout 1.3.0.rc30.1 or higher
     *
     * @see: http://groups.google.com/group/jquery-ui-layout
     *
     * Docs: [ to come ]
     * Tips: [ to come ]
     */

// tell Layout that the status plugin is available
    $.layout.plugins.buttons = true;

//	Add buttons options to layout.defaults
    $.layout.defaults.autoBindCustomButtons = false;
// Specify autoBindCustomButtons as a layout-option, NOT a pane-option
    $.layout.optionsMap.layout.push("autoBindCustomButtons");

    /*
     *	Button methods
     */
    $.layout.buttons = {

        /**
         * Searches for .ui-layout-button-xxx elements and auto-binds them as layout-buttons
         *
         * @see  _create()
         *
         * @param  {Object}		inst	Layout Instance object
         */
        init: function (inst) {
            var pre		= "ui-layout-button-"
                ,	layout	= inst.options.name || ""
                ,	name;
            $.each("toggle,open,close,pin,toggle-slide,open-slide".split(","), function (i, action) {
                $.each($.layout.config.borderPanes, function (ii, pane) {
                    $("."+pre+action+"-"+pane).each(function(){
                        // if button was previously 'bound', data.layoutName was set, but is blank if layout has no 'name'
                        name = $(this).data("layoutName") || $(this).attr("layoutName");
                        if (name == undefined || name === layout)
                            inst.bindButton(this, action, pane);
                    });
                });
            });
        }

        /**
         * Helper function to validate params received by addButton utilities
         *
         * Two classes are added to the element, based on the buttonClass...
         * The type of button is appended to create the 2nd className:
         *  - ui-layout-button-pin		// action btnClass
         *  - ui-layout-button-pin-west	// action btnClass + pane
         *  - ui-layout-button-toggle
         *  - ui-layout-button-open
         *  - ui-layout-button-close
         *
         * @param {Object}			inst		Layout Instance object
         * @param {(string|!Object)}	selector	jQuery selector (or element) for button, eg: ".ui-layout-north .toggle-button"
         * @param {string}   		pane 		Name of the pane the button is for: 'north', 'south', etc.
         *
         * @return {Array.<Object>}	If both params valid, the element matching 'selector' in a jQuery wrapper - otherwise returns null
         */
        ,	get: function (inst, selector, pane, action) {
            var $E	= $(selector)
                ,	o	= inst.options
                ,	err	= o.errors.addButtonError
                ;
            if (!$E.length) { // element not found
                $.layout.msg(err +" "+ o.errors.selector +": "+ selector, true);
            }
            else if ($.inArray(pane, $.layout.config.borderPanes) < 0) { // invalid 'pane' sepecified
                $.layout.msg(err +" "+ o.errors.pane +": "+ pane, true);
                $E = $("");  // NO BUTTON
            }
            else { // VALID
                var btn = o[pane].buttonClass +"-"+ action;
                $E	.addClass( btn +" "+ btn +"-"+ pane )
                    .data("layoutName", o.name); // add layout identifier - even if blank!
            }
            return $E;
        }


        /**
         * NEW syntax for binding layout-buttons - will eventually replace addToggle, addOpen, etc.
         *
         * @param {Object}			inst		Layout Instance object
         * @param {(string|!Object)}	selector	jQuery selector (or element) for button, eg: ".ui-layout-north .toggle-button"
         * @param {string}			action
         * @param {string}			pane
         */
        ,	bind: function (inst, selector, action, pane) {
            var _ = $.layout.buttons;
            switch (action.toLowerCase()) {
                case "toggle":			_.addToggle	(inst, selector, pane); break;
                case "open":			_.addOpen	(inst, selector, pane); break;
                case "close":			_.addClose	(inst, selector, pane); break;
                case "pin":				_.addPin	(inst, selector, pane); break;
                case "toggle-slide":	_.addToggle	(inst, selector, pane, true); break;
                case "open-slide":		_.addOpen	(inst, selector, pane, true); break;
            }
            return inst;
        }

        /**
         * Add a custom Toggler button for a pane
         *
         * @param {Object}			inst		Layout Instance object
         * @param {(string|!Object)}	selector	jQuery selector (or element) for button, eg: ".ui-layout-north .toggle-button"
         * @param {string}  			pane 		Name of the pane the button is for: 'north', 'south', etc.
         * @param {boolean=}			slide 		true = slide-open, false = pin-open
         */
        ,	addToggle: function (inst, selector, pane, slide) {
            $.layout.buttons.get(inst, selector, pane, "toggle")
                .click(function(evt){
                    inst.toggle(pane, !!slide);
                    evt.stopPropagation();
                });
            return inst;
        }

        /**
         * Add a custom Open button for a pane
         *
         * @param {Object}			inst		Layout Instance object
         * @param {(string|!Object)}	selector	jQuery selector (or element) for button, eg: ".ui-layout-north .toggle-button"
         * @param {string}			pane 		Name of the pane the button is for: 'north', 'south', etc.
         * @param {boolean=}			slide 		true = slide-open, false = pin-open
         */
        ,	addOpen: function (inst, selector, pane, slide) {
            $.layout.buttons.get(inst, selector, pane, "open")
                .attr("title", inst.options[pane].tips.Open)
                .click(function (evt) {
                    inst.open(pane, !!slide);
                    evt.stopPropagation();
                });
            return inst;
        }

        /**
         * Add a custom Close button for a pane
         *
         * @param {Object}			inst		Layout Instance object
         * @param {(string|!Object)}	selector	jQuery selector (or element) for button, eg: ".ui-layout-north .toggle-button"
         * @param {string}   		pane 		Name of the pane the button is for: 'north', 'south', etc.
         */
        ,	addClose: function (inst, selector, pane) {
            $.layout.buttons.get(inst, selector, pane, "close")
                .attr("title", inst.options[pane].tips.Close)
                .click(function (evt) {
                    inst.close(pane);
                    evt.stopPropagation();
                });
            return inst;
        }

        /**
         * Add a custom Pin button for a pane
         *
         * Four classes are added to the element, based on the paneClass for the associated pane...
         * Assuming the default paneClass and the pin is 'up', these classes are added for a west-pane pin:
         *  - ui-layout-pane-pin
         *  - ui-layout-pane-west-pin
         *  - ui-layout-pane-pin-up
         *  - ui-layout-pane-west-pin-up
         *
         * @param {Object}			inst		Layout Instance object
         * @param {(string|!Object)}	selector	jQuery selector (or element) for button, eg: ".ui-layout-north .toggle-button"
         * @param {string}   		pane 		Name of the pane the pin is for: 'north', 'south', etc.
         */
        ,	addPin: function (inst, selector, pane) {
            var	_	= $.layout.buttons
                ,	$E	= _.get(inst, selector, pane, "pin");
            if ($E.length) {
                var s = inst.state[pane];
                $E.click(function (evt) {
                    _.setPinState(inst, $(this), pane, (s.isSliding || s.isClosed));
                    if (s.isSliding || s.isClosed) inst.open( pane ); // change from sliding to open
                    else inst.close( pane ); // slide-closed
                    evt.stopPropagation();
                });
                // add up/down pin attributes and classes
                _.setPinState(inst, $E, pane, (!s.isClosed && !s.isSliding));
                // add this pin to the pane data so we can 'sync it' automatically
                // PANE.pins key is an array so we can store multiple pins for each pane
                s.pins.push( selector ); // just save the selector string
            }
            return inst;
        }

        /**
         * Change the class of the pin button to make it look 'up' or 'down'
         *
         * @see  addPin(), syncPins()
         *
         * @param {Object}			inst	Layout Instance object
         * @param {Array.<Object>}	$Pin	The pin-span element in a jQuery wrapper
         * @param {string}			pane	These are the params returned to callbacks by layout()
         * @param {boolean}			doPin	true = set the pin 'down', false = set it 'up'
         */
        ,	setPinState: function (inst, $Pin, pane, doPin) {
            var updown = $Pin.attr("pin");
            if (updown && doPin === (updown=="down")) return; // already in correct status
            var
                o		= inst.options[pane]
                ,	pin		= o.buttonClass +"-pin"
                ,	side	= pin +"-"+ pane
                ,	UP		= pin +"-up "+	side +"-up"
                ,	DN		= pin +"-down "+side +"-down"
                ;
            $Pin
                .attr("pin", doPin ? "down" : "up") // logic
                .attr("title", doPin ? o.tips.Unpin : o.tips.Pin)
                .removeClass( doPin ? UP : DN )
                .addClass( doPin ? DN : UP )
            ;
        }

        /**
         * INTERNAL function to sync 'pin buttons' when pane is opened or closed
         * Unpinned means the pane is 'sliding' - ie, over-top of the adjacent panes
         *
         * @see  open(), close()
         *
         * @param {Object}			inst	Layout Instance object
         * @param {string}	pane	These are the params returned to callbacks by layout()
         * @param {boolean}	doPin	True means set the pin 'down', False means 'up'
         */
        ,	syncPinBtns: function (inst, pane, doPin) {
            // REAL METHOD IS _INSIDE_ LAYOUT - THIS IS HERE JUST FOR REFERENCE
            $.each(inst.state[pane].pins, function (i, selector) {
                $.layout.buttons.setPinState(inst, $(selector), pane, doPin);
            });
        }


        ,	_load: function (inst) {
            var	_	= $.layout.buttons;
            // ADD Button methods to Layout Instance
            // Note: sel = jQuery Selector string
            $.extend( inst, {
                bindButton:		function (sel, action, pane) { return _.bind(inst, sel, action, pane); }
                //	DEPRECATED METHODS
                ,	addToggleBtn:	function (sel, pane, slide) { return _.addToggle(inst, sel, pane, slide); }
                ,	addOpenBtn:		function (sel, pane, slide) { return _.addOpen(inst, sel, pane, slide); }
                ,	addCloseBtn:	function (sel, pane) { return _.addClose(inst, sel, pane); }
                ,	addPinBtn:		function (sel, pane) { return _.addPin(inst, sel, pane); }
            });

            // init status array to hold pin-buttons
            for (var i=0; i<4; i++) {
                var pane = $.layout.config.borderPanes[i];
                inst.state[pane].pins = [];
            }

            // auto-init buttons onLoad if option is enabled
            if ( inst.options.autoBindCustomButtons )
                _.init(inst);
        }

        ,	_unload: function (inst) {
            // TODO: unbind all buttons???
        }

    };

// add initialization method to Layout's onLoad array of functions
    $.layout.onLoad.push(  $.layout.buttons._load );
//$.layout.onUnload.push( $.layout.buttons._unload );



    /**
     * jquery.layout.browserZoom 1.0
     * $Date: 2011-12-29 08:00:00 (Thu, 29 Dec 2011) $
     *
     * Copyright (c) 2012
     *   Kevin Dalman (http://allpro.net)
     *
     * Dual licensed under the GPL (http://www.gnu.org/licenses/gpl.html)
     * and MIT (http://www.opensource.org/licenses/mit-license.php) licenses.
     *
     * @requires: UI Layout 1.3.0.rc30.1 or higher
     *
     * @see: http://groups.google.com/group/jquery-ui-layout
     *
     * TODO: Extend logic to handle other problematic zooming in browsers
     * TODO: Add hotkey/mousewheel bindings to _instantly_ respond to these zoom event
     */

// tell Layout that the plugin is available
    $.layout.plugins.browserZoom = true;

    $.layout.defaults.browserZoomCheckInterval = 1000;
    $.layout.optionsMap.layout.push("browserZoomCheckInterval");

    /*
     *	browserZoom methods
     */
    $.layout.browserZoom = {

        _init: function (inst) {
            // abort if browser does not need this check
            if ($.layout.browserZoom.ratio() !== false)
                $.layout.browserZoom._setTimer(inst);
        }

        ,	_setTimer: function (inst) {
            // abort if layout destroyed or browser does not need this check
            if (inst.destroyed) return;
            var o	= inst.options
                ,	s	= inst.state
            //	don't need check if inst has parentLayout, but check occassionally in case parent destroyed!
            //	MINIMUM 100ms interval, for performance
                ,	ms	= inst.hasParentLayout ?  5000 : Math.max( o.browserZoomCheckInterval, 100 )
                ;
            // set the timer
            setTimeout(function(){
                    if (inst.destroyed || !o.resizeWithWindow) return;
                    var d = $.layout.browserZoom.ratio();
                    if (d !== s.browserZoom) {
                        s.browserZoom = d;
                        inst.resizeAll();
                    }
                    // set a NEW timeout
                    $.layout.browserZoom._setTimer(inst);
                }
                ,	ms );
        }

        ,	ratio: function () {
            var w	= window
                ,	s	= screen
                ,	d	= document
                ,	dE	= d.documentElement || d.body
                ,	b	= $.layout.browser
                ,	v	= b.version
                ,	r, sW, cW
                ;
            // we can ignore all browsers that fire window.resize event onZoom
            if ((b.msie && v > 8)
                ||	!b.msie
                ) return false; // don't need to track zoom

            if (s.deviceXDPI && s.systemXDPI) // syntax compiler hack
                return calc(s.deviceXDPI, s.systemXDPI);
            // everything below is just for future reference!
            if (b.webkit && (r = d.body.getBoundingClientRect))
                return calc((r.left - r.right), d.body.offsetWidth);
            if (b.webkit && (sW = w.outerWidth))
                return calc(sW, w.innerWidth);
            if ((sW = s.width) && (cW = dE.clientWidth))
                return calc(sW, cW);
            return false; // no match, so cannot - or don't need to - track zoom

            function calc (x,y) { return (parseInt(x,10) / parseInt(y,10) * 100).toFixed(); }
        }

    };
// add initialization method to Layout's onLoad array of functions
    $.layout.onReady.push( $.layout.browserZoom._init );


})( jQuery );